Columbia subject headings:
Cornell University. Libraries--Catalogs.
Natural history libraries--New York (State)--Ithaca--Catalogs.
Ornithology.
Harvard subject headings:
Birds--Bibliography--Catalogs.
Cornell University. Libraries--Catalogs.
Princeton subject headings:
Cornell University. Libraries--Catalogs.
Natural history libraries--New York (State)--Ithaca--Catalogs.
Ornithology.