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Institution
Collection
Format
Subject
16
Geology
16
Maryland
14
Groundwater
11
Historic sites
11
Water quality
10
Maryland History
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10
National parks and reserves
9
Groundwater Pollution
8
Geology, Stratigraphic
8
Groundwater flow
8
History
7
Antietam National Battlefield (Md.)
7
Hydrogeology
7
Stream measurements
7
Water Pollution
7
Wildlife refuges
6
Blackwater National Wildlife Refuge (Md.)
6
Hydrology
6
Research
5
Abolitionists
5
Eastern Neck National Wildlife Refuge (Md.)
5
Groundwater Quality
5
Information services
5
Landscape protection
5
National parks and reserves Law and legislation
5
Officials and employees
5
Paleontology
4
Aberdeen Proving Ground (Md.)
4
African Americans
4
Amphibians
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Author
72
Geological Survey (U.S.)
22
United States. National Park Service
20
U.S. Fish and Wildlife Service
12
Educational Resources Information Center (U.S.)
11
Aberdeen Proving Ground (Md.). Environmental Conservation and Restoration Division
10
National Institutes of Health (U.S.)
more ...
8
United States. Congress. House. Committee on Transportation and Infrastructure
7
Goddard Space Flight Center
7
Maryland Geological Survey
7
United States. Congress. Senate. Committee on Energy and Natural Resources
6
Lorah, Michelle M.
6
National Cancer Institute (U.S.)
6
National Institutes of Health (U.S.). Clinical Center
5
Maryland. Department of the Environment
5
United States. Congress. House. Committee on Resources
5
Vroblesky, Don A.
4
Epstein, Joyce Levy
4
Hayes, Donald C.
4
Maryland. Department of Natural Resources
4
National Institutes of Health (U.S.). Office of Clinical Center Communications
4
Phelan, Daniel J.
4
Tenbus, Frederick J.
4
United States. Administration on Aging
4
United States. Congress. House. Committee on Resources. Subcommittee on Fisheries Conservation, Wildlife, and Oceans
4
United States. National Park Service,
4
United States. Office of Educational Research and Improvement
4
Wheeler, Judith C.
3
Banks, William S. L.
3
Delaware. Department of Transportation
3
Dillow, Jonathan J. A.
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Language
Genre
14
Biographies
8
Autobiographies
6
Case studies
5
Guidebooks
4
Catalogs
4
Directories
more ...
3
Handbooks and manuals
2
Bibliographies
2
Conference papers and proceedings
2
Literature
2
Maps
2
Sources
2
Statistics
2
Statutes and codes
2
Trivia and miscellanea
1
Architectural drawings
1
Charters and articles of incorporation
1
Congresses
1
Correspondence
1
Databases
1
Designs and plans
1
Diaries
1
Exhibition catalogs
1
Gazetteers
1
Identification
1
Longitudinal studies
1
Personal correspondence
1
Rules and practice
1
Software
1
Trial and arbitral proceedings
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Literary Form
Era
7
19th century
7
Colonial period, ca. 1600-1775
5
1818-1895
4
Civil War, 1861-1865
3
Revolution, 1775-1783
3
Tertiary
more ...
2
1822-1913
2
1918-1996
2
Cambrian
2
To 1775
2
War of 1812
1
1639-approximately 1703
1
1702-1782
1
1728-1786
1
1737-1832
1
1743-1787
1
1757?-1834
1
1771-1839
1
17th century
1
1805-1880
1
1816-1902
1
1821-1912
1
1838-1903
1
18th century
1
1917-1963
1
1945-1989
1
1946-
1
1951-
1
1971-
1
1989-2015
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Region
Maryland
42
Baltimore
36
United States
35
Bethesda
28
Virginia
20
Aberdeen Proving Ground
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16
Delaware
15
Pennsylvania
14
Washington (D.C.)
10
West Virginia
7
Antietam National Battlefield (Md.)
7
Greenbelt
6
Antietam National Battlefield
6
Baltimore (Md.)
6
Blackwater National Wildlife Refuge (Md.)
6
Patuxent River Watershed
5
Baltimore County
5
Chesapeake and Ohio Canal National Historical Park
5
Eastern Neck National Wildlife Refuge (Md.)
5
Montgomery County
5
Prince George's County
4
Aberdeen Proving Ground (Md.)
4
Baltimore Metropolitan Area
4
Chesapeake Bay (Md. and Va.)
4
Chincoteague National Wildlife Refuge (Va. and Md.)
4
Harpers Ferry National Historical Park
4
Laurel
4
New Jersey
4
North Carolina
3
Aberdeen
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Call Number
54
H - Social Science
44
E - United States History
38
Q - Science
29
G - Geography, Anthropology, Recreation
23
F - General American History
22
D - World History
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17
K - Law
13
T - Technology
10
A - General Works
9
N - Fine Arts
4
C - Historical Sciences
3
J - Political Science
1
L - Education
1
P - Language and Literature
1
R - Medicine
1
V - Naval Science
1
Z - Library Science
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Year of Publication