Columbia subject headings:
Harvard subject headings:
Engineering--Societies, etc.--Directories.
Engineering--United States--Societies, etc.--Directories.
Science--Societies, etc.--Directories
Science--United States--Societies, etc.--Directories.
Technology--Societies, etc.--Directories.
Technology--United States--Societies, etc.--Directories.
Princeton subject headings:
Directories.
Engineering--Societies, etc.--Directories.
Engineering--United States--Societies, etc.--Directories.
Science--Societies, etc.--Directories.
Science--United States--Societies, etc.--Directories.
Technology--Societies, etc.--Directories.
Technology--United States--Societies, etc.--Directories.