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-rw-r--r--fatcat_scholar/search.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/fatcat_scholar/search.py b/fatcat_scholar/search.py
index c0e8189..2d65946 100644
--- a/fatcat_scholar/search.py
+++ b/fatcat_scholar/search.py
@@ -192,6 +192,7 @@ def do_fulltext_search(
Q("bool", must_not=Q("exists", field="year")),
Q("bool", must_not=Q("exists", field="type")),
Q("bool", must_not=Q("exists", field="stage")),
+ Q("bool", must_not=Q("exists", field="biblio.container_ident")),
],
)