Columbia subject headings:
Engineering--Bibliography--Catalogs.
New York Public Library--Catalogs.
Technology--Bibliography--Catalogs.
Harvard subject headings:
Engineering--Bibliography--Catalogs
New York Public Library--Catalogs.
Technology--Bibliography--Catalogs
Princeton subject headings:
Catalogs.
Engineering--Bibliography--Catalogs.
New York Public Library--Catalogs.
Technology--Bibliography--Catalogs.