Columbia subject headings:
Harvard subject headings:
Artists' preparatory studies--United States--Exhibitions.
Audubon, John James, 1785-1851. Birds of America--Exhibitions.
Birds--North America--Pictorial works--Exhibitions.
Havell, Robert, 1793-1878--Exhibitions.
Ornithological illustration--Exhibitions.
Proofs (Printing)--Exhibitions.
Watercolor painting, American--Exhibitions
Princeton subject headings:
Audubon, John James, 1785-1851. Birds of America--Exhibitions.
Birds--North America--Pictorial works--Exhibitions.
Ornithological illustration--Exhibitions.
Watercolor painting, American--Exhibitions.