Columbia subject headings:
Labor policy--United States--Handbooks, manuals, etc.
Labor unions--United States--Handbooks, manuals, etc.
Working class--United States--Handbooks, manuals, etc.
Harvard subject headings:
Industrial relations--United States--Handbooks, manuals, etc.
Labor policy--United States--Handbooks, manuals, etc.
Labor unions--United States--Handbooks, manuals, etc.
Princeton subject headings:
Industrial relations--United States--Handbooks, manuals, etc.
Labor policy--United States--Handbooks, manuals, etc.
Labor unions--United States--Handbooks, manuals, etc.