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Institution
Collection
Format
Subject
14
Geology
14
Groundwater
11
Historic sites
11
Maryland
11
National parks and reserves
10
Water quality
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9
Groundwater Pollution
8
Groundwater flow
8
Stream measurements
7
Antietam National Battlefield (Md.)
7
Hydrogeology
7
Hydrology
7
Wildlife refuges
6
Fast food restaurants
6
Landscape protection
6
Research
6
Wages Food industry and trade
6
Water Pollution
5
Geology, Stratigraphic
5
Groundwater Quality
5
Historic buildings
5
Information services
5
Officials and employees
5
Water consumption
4
Blackwater National Wildlife Refuge (Md.)
4
Eastern Neck National Wildlife Refuge (Md.)
4
Floods
4
History
4
Nutrient pollution of water
4
Paleontology
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Author
76
Geological Survey (U.S.)
23
United States. National Park Service
17
U.S. Fish and Wildlife Service
10
Aberdeen Proving Ground (Md.). Environmental Conservation and Restoration Division
10
National Institutes of Health (U.S.)
9
United States. Bureau of Labor Statistics
more ...
7
Goddard Space Flight Center
7
Maryland Geological Survey
7
United States. National Park Service,
6
Maryland. Department of the Environment
6
National Cancer Institute (U.S.)
6
National Institutes of Health (U.S.). Clinical Center
5
Lorah, Michelle M.
5
Wheeler, Judith C.
4
Banks, William S. L.
4
Dillow, Jonathan J. A.
4
Hayes, Donald C.
4
Maryland. Department of Natural Resources
4
National Institutes of Health (U.S.). Office of Clinical Center Communications
4
Tenbus, Frederick J.
4
Vroblesky, Don A.
3
Delaware. Department of Transportation
3
Fisher, Gary T.
3
Fleck, William B.
3
Herb, William J.
3
Maryland. Department of Transportation
3
Minard, James P.
3
National Library of Medicine (U.S.)
3
Phelan, Daniel J.
3
United States. Department of the Army
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Language
Genre
11
Statistics
10
Maps
10
Periodicals
2
Conference papers and proceedings
2
Directories
2
Guidebooks
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2
Handbooks and manuals
1
Aerial views
1
Architectural drawings
1
Bibliographies
1
Biographies
1
Case studies
1
Catalogs
1
Congresses
1
Databases
1
Designs and plans
1
Exhibition catalogs
1
Gazetteers
1
Identification
1
Indexes
1
Literature
1
Longitudinal studies
1
Tourist maps
1
Trivia and miscellanea
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Literary Form
Era
Region
Maryland
35
Bethesda
26
Virginia
17
Aberdeen Proving Ground
15
Delaware
13
United States
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12
Pennsylvania
11
Washington (D.C.)
10
Baltimore
8
Greenbelt
8
West Virginia
7
Antietam National Battlefield (Md.)
6
Antietam National Battlefield
6
Baltimore Metropolitan Area
6
Montgomery County
6
Patuxent River Watershed
4
Anne Arundel County
4
Blackwater National Wildlife Refuge (Md.)
4
Chesapeake and Ohio Canal National Historical Park
4
Chincoteague National Wildlife Refuge (Va. and Md.)
4
Eastern Neck National Wildlife Refuge (Md.)
3
Aberdeen
3
Aberdeen Proving Ground (Md.)
3
Adelphi
3
Baltimore County
3
Baltimore Region
3
Beltsville
3
Blackwater National Wildlife Refuge
3
Fort McHenry National Monument and Historic Shrine (Baltimore, Md.)
3
Hampton National Historic Site (Md.)
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Call Number
40
H - Social Science
35
Q - Science
27
G - Geography, Anthropology, Recreation
22
D - World History
13
T - Technology
12
F - General American History
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10
L - Education
8
A - General Works
8
E - United States History
6
N - Fine Arts
3
C - Historical Sciences
2
J - Political Science
2
K - Law
1
V - Naval Science
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Year of Publication