Subject
Groundwater
50
Geology
45
Education, Bilingual
34
History
34
New York (State)
31
Water quality
30
Historic sites
29
Homes and haunts
26
Water-supply
25
Groundwater flow
22
New York (N.Y.)
20
New York (State) Politics and government
20
Theater History
20
September 11 Terrorist Attacks, 2001
19
Theater
19
New York (N.Y.) History
18
Buildings
16
Historic sites Law and legislation
16
African Americans
15
Art collections
15
Baseball History
15
Hydrogeology
15
New York (State) History
15
Paleontology
15
Post office buildings
15
Water Pollution
15
National parks and reserves
14
New York (N.Y.) Politics and government
14
Magnetite
13
Puerto Ricans
13
Stream measurements
13
Aquifers
12
Art, American
12
Courthouses
12
Geology, Stratigraphic
12
Groundwater Pollution
12
Harlem Renaissance
12
New York (N.Y.) Intellectual life
12
New York (N.Y.) Social life and customs
12
Art
11
Historic buildings Conservation and restoration
11
September 11 Terrorist Attacks, 2001 Health aspects
11
Wildlife refuges
11
Gateway National Recreation Area (N.J. and N.Y.)
10
Home of Franklin D. Roosevelt National Historic Site (Hyde Park, N.Y.)
10
Mines and mineral resources
10
Musicals History and criticism
10
Public buildings
10
September 11 Terrorist Attacks, 2001 Environmental aspects
10
United States Politics and government
10
more ...