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-rw-r--r--guide/src/reference_graph.md7
1 files changed, 4 insertions, 3 deletions
diff --git a/guide/src/reference_graph.md b/guide/src/reference_graph.md
index 4f9f71dd..1470e124 100644
--- a/guide/src/reference_graph.md
+++ b/guide/src/reference_graph.md
@@ -119,8 +119,9 @@ only, and is missing many current references and citations. Additionally, only
direct identifier lookups (eg, DOI matches) are used, not fuzzy metadata
matching.
-Open Library "target" matches are based on a snapshot of Open Library works,
-and are matched either ISBN (extracted from citation string) or fuzzy metadata
+Open Library "target" matches are based on a
+[snapshot](https://openlibrary.org/developers/dumps) of Open Library works, and
+are matched either ISBN (extracted from citation string) or fuzzy metadata
matching.
Crossref references are extracted from a January 2021
@@ -128,7 +129,7 @@ Crossref references are extracted from a January 2021
metadata, and do not include many updates to existing works.
Hundreds of millions of raw citation strings ("unstructured") have not been
-parsed into a structured for for fuzzy matching. We plan to use GROBID to parse
+parsed into a structured for fuzzy matching. We plan to use GROBID to parse
these citation strings, in addition to the current use of GROBID parsing for
references from fulltext documents.