Columbia subject headings:
Library materials--Purchasing--United States--Handbooks, manuals, etc.
Library materials--United States--Purchasing--Handbooks, manuals, etc.
Publishers and publishing--United States--Handbooks, manuals, etc.
Harvard subject headings:
Handbooks and manuals
Library materials--Purchasing--United States--Handbooks, manuals, etc.
Publishers and publishing--United States--Handbooks, manuals, etc.
Princeton subject headings: