Subject
Groundwater
209
Geology
146
Aquifers
106
Water quality
105
New York (State)
86
Hydrogeology
76
September 11 Terrorist Attacks, 2001
73
Water-supply
70
Groundwater flow
61
Post office buildings
56
New York (N.Y.)
55
Homes and haunts
48
Water Pollution
46
History
44
Historic sites
41
Stream measurements
40
Groundwater Pollution
37
Education, Bilingual
34
Groundwater Quality
34
Historic sites Law and legislation
34
Floods
31
Geomagnetism
30
Theater
30
Buildings
29
African Americans
27
September 11 Terrorist Attacks, 2001 Health aspects
27
Water table
27
Families
26
Paleontology
26
Geology, Stratigraphic
25
New York (N.Y.) History
25
New York (State) History
23
New York (State) Politics and government
23
Gateway National Recreation Area (N.J. and N.Y.)
22
Historic buildings Conservation and restoration
22
Hydrology
22
Streamflow
22
Theater History
22
Magnetite
19
Mines and mineral resources
19
National parks and reserves
19
Art
18
Artificial groundwater recharge
18
Musicals History and criticism
18
Skyscrapers Fires and fire prevention
18
Courthouses
17
Puerto Ricans
17
Auditing
16
Jews
16
New York (N.Y.) Politics and government
16
more ...