Columbia subject headings:
Geological Survey (U.S.)--Handbooks, manuals, etc.
Geologists--Health and hygiene--United States--Handbooks, manuals, etc.
Geology--United States--Safety measures--Handbooks, manuals, etc.
Industrial safety--United States--Handbooks, manuals, etc.
Harvard subject headings:
Princeton subject headings:
Geological Survey (U.S.)--Handbooks, manuals, etc.
Geologists--Health and hygiene--United States--Handbooks, manuals, etc.
Geology--United States--Safety measures--Handbooks, manuals, etc.
Industrial safety--United States--Handbooks, manuals, etc.