Columbia subject headings:
Groundwater--Handbooks, manuals, etc.
Wells--Design and construction--Handbooks, manuals, etc.
Harvard subject headings:
Groundwater--Handbooks, manuals, etc.
Wells--Design and construction--Handbooks, manuals, etc.
Princeton subject headings:
Groundwater--Handbooks, manuals, etc.
Wells--Design and construction--Handbooks, manuals, etc.