diff --git a/quickpeep/src/bin/qp-rake1.rs b/quickpeep/src/bin/qp-rake1.rs
index 363f791..6930b03 100644
--- a/quickpeep/src/bin/qp-rake1.rs
+++ b/quickpeep/src/bin/qp-rake1.rs
@@ -12,6 +12,7 @@ use quickpeep_structs::rake_entries::{AnalysisAntifeatures, RakedReference, Refe
 use reqwest::header::{HeaderMap, HeaderValue, USER_AGENT};
 use reqwest::redirect::Policy;
 use reqwest::Url;
+use std::collections::BTreeSet;
 use std::path::PathBuf;
 use tokio::fs::File;
 
@@ -121,7 +122,7 @@ pub async fn main() -> anyhow::Result<()> {
     Ok(())
 }
 
-fn print_references(refs: &Vec<RakedReference>) {
+fn print_references(refs: &BTreeSet<RakedReference>) {
     println!("{} References", refs.len());
     for reference in refs {
         println!("\t{:?} → {}", reference.kind, reference.target);
diff --git a/quickpeep/src/raking/references.rs b/quickpeep/src/raking/references.rs
index 7e7d72d..40b32ac 100644
--- a/quickpeep/src/raking/references.rs
+++ b/quickpeep/src/raking/references.rs
@@ -1,17 +1,17 @@
 use crate::raking::UrlRaked;
-use itertools::Itertools;
 use quickpeep_densedoc::{DenseDocument, DenseTree};
 use quickpeep_structs::rake_entries::{RakedReference, ReferenceKind};
 use reqwest::Url;
+use std::collections::BTreeSet;
 
 pub fn find_references(
     doc: &DenseDocument,
     feeds: &Vec<Url>,
     page_url: &Url,
-) -> Vec<RakedReference> {
-    let mut refs = Vec::new();
+) -> BTreeSet<RakedReference> {
+    let mut refs = BTreeSet::new();
 
-    fn add_link_refs(tree: &Vec<DenseTree>, refs: &mut Vec<RakedReference>, page_url: &Url) {
+    fn add_link_refs(tree: &Vec<DenseTree>, refs: &mut BTreeSet<RakedReference>, page_url: &Url) {
         for node in tree {
             match node {
                 DenseTree::Heading1(children) => {
@@ -39,10 +39,10 @@ pub fn find_references(
                 } => {
                     if !nofollow {
                         if let Ok(full_url) = page_url.join(&href) {
-                            refs.push(RakedReference {
-                                target: full_url.to_string(),
+                            refs.insert(RakedReference {
+                                target: clean_url(&full_url).to_string(),
                                 kind: ReferenceKind::Link,
-                            })
+                            });
                         }
                     }
                     add_link_refs(children, refs, page_url);
@@ -57,8 +57,8 @@ pub fn find_references(
     add_link_refs(&doc.body_remainder, &mut refs, &page_url);
 
     for feed in feeds {
-        refs.push(RakedReference {
-            target: feed.as_str().to_owned(),
+        refs.insert(RakedReference {
+            target: clean_url(feed).as_str().to_owned(),
             kind: ReferenceKind::HeaderLinkedFeed,
         });
     }
@@ -69,12 +69,39 @@ pub fn find_references(
 pub fn references_from_urlrakes(
     input: &Vec<UrlRaked>,
     ref_kind: ReferenceKind,
-) -> Vec<RakedReference> {
+) -> BTreeSet<RakedReference> {
     input
         .iter()
         .map(|url_raked| RakedReference {
             target: url_raked.url.to_string(),
             kind: ref_kind,
         })
-        .collect_vec()
+        .collect()
+}
+
+pub fn clean_url(url: &Url) -> Url {
+    let mut url = url.clone();
+    url.set_fragment(None);
+
+    url
+}
+
+#[cfg(test)]
+mod test {
+    use crate::raking::references::clean_url;
+    use reqwest::Url;
+    use std::str::FromStr;
+
+    #[test]
+    pub fn test_clean_url() {
+        assert_eq!(
+            clean_url(&Url::from_str("https://example.org:443/blah#hahah").unwrap()).as_str(),
+            "https://example.org/blah",
+        );
+
+        assert_eq!(
+            clean_url(&Url::from_str("https://example.org").unwrap()).as_str(),
+            "https://example.org/",
+        );
+    }
 }
diff --git a/quickpeep_structs/src/rake_entries.rs b/quickpeep_structs/src/rake_entries.rs
index c847963..d605381 100644
--- a/quickpeep_structs/src/rake_entries.rs
+++ b/quickpeep_structs/src/rake_entries.rs
@@ -2,6 +2,7 @@ use bitflags::bitflags;
 use bitflags_serde_shim::impl_serde_for_bitflags;
 use quickpeep_densedoc::DenseDocument;
 use serde::{Deserialize, Serialize};
+use std::collections::BTreeSet;
 
 bitflags! {
     pub struct AnalysisAntifeatures: u8 {
@@ -30,20 +31,24 @@ pub struct RakedPageEntry {
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct RakedReferrerEntry {
-    pub references: Vec<RakedReference>,
+    pub references: BTreeSet<RakedReference>,
 }
 
-#[derive(Serialize, Deserialize, Debug, Clone)]
+#[derive(Serialize, Deserialize, Debug, Clone, Ord, PartialOrd, Eq, PartialEq)]
 pub struct RakedReference {
     pub target: String,
     pub kind: ReferenceKind,
 }
 
-#[derive(Serialize, Deserialize, Debug, Copy, Clone)]
+#[derive(Serialize, Deserialize, Debug, Copy, Clone, Ord, PartialOrd, Eq, PartialEq)]
 pub enum ReferenceKind {
+    /// Canonical URL for the same document, as declared in the page.
     CanonicalUrl,
+    /// HTTP-level redirect.
     Redirect,
+    /// Link in a page (<a>). Could be to another page or to a feed.
     Link,
+    /// <link> to a feed
     HeaderLinkedFeed,
     FeedEntry,
     SitemapEntry,