Columbia subject headings:
Engineering geology--New York Metropolitan Area--Guidebooks.
Engineering geology--Washington Metropolitan Area--Guidebooks.
Geology--New York Metropolitan Area--Guidebooks.
Geology--Washington Metropolitan Area--Guidebooks.
New York Metropolitan Area--Guidebooks.
Washington Metropolitan Area--Guidebooks.
Harvard subject headings:
Engineering geology--New York (State)--New York Metropolitan Area--Guidebooks.
Engineering geology--United States--Guidebooks.
Engineering geology--Washington Metropolitan Area--Guidebooks.
Geology--New York (State)--New York Metropolitan Area--Guidebooks.
Geology--United States--Guidebooks.
Geology--Washington Metropolitan Area--Guidebooks.
New York Metropolitan Area--Guidebooks.
Washington Metropolitan Area--Guidebooks.
Princeton subject headings:
Engineering geology--New York Metropolitan Area--Guidebooks.
Engineering geology--Washington Metropolitan Area--Guidebooks.
Geology--New York Metropolitan Area--Guidebooks.
Geology--Washington Metropolitan Area--Guidebooks.
New York Metropolitan Area--Guidebooks.
Washington Metropolitan Area--Guidebooks.