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1
by Patten, J. M., 1944-
Vero Beach, Fla. : Rourke Book Co., 1995

Book
2
Annapolis, Md. (410 Severn Ave., Suite 109, Annapolis 21403) : Chesapeake Bay Program, 1999

This item is not available through EZBorrow. Please contact your institution’s interlibrary loan office for further assistance.
Government Document Book
3
Oley, Pa. : Bullfrog Films, 2009

Unknown
4
Washington, DC : American Public Health Association, 1998
20th ed. 1998.

Book
5
Annapolis, Md. (410 Severn Ave., Suite 109, Annapolis 21403) : Chesapeake Bay Program, 1999

This item is not available through EZBorrow. Please contact your institution’s interlibrary loan office for further assistance.
Government Document Book
6
[Annapolis, Md.?] : Chesapeake Bay Program, 1997

This item is not available through EZBorrow. Please contact your institution’s interlibrary loan office for further assistance.
Government Document Book
7
Washington, [D.C.] : [Conservation Foundation], 1972

Book
8
by Lucas, Eileen
Chicago : Children's Press, 1991

Book
9
Bala Cynwyd, Pa : Schlessinger Video Productions, a division of Library Video Company, 1993

Unknown
10
Bala Cynwyd, Pa : Schlessinger Video Productions, a division of Library Video Company, 1993

Unknown
11
[Harrisburg] Joint State Government Commission, General Assembly of Pennsylvania, 1967

Book
13
by Hirschmann, Kris, 1967-
Detroit : Kidhaven Press : Thomson/Gale, 2005

Book
14
by Sootin, Harry
New York, Four Winds Press 1974

Book
15
by Anderson, Bob, 1950-
San Diego, CA : Greenhaven Press, 1991

Book
16
by Stern, Arthur C.
New York : Academic Press, 1977

Book
17
Baltimore, Md. : [s.n.], 1970

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Book
18
Washington, U.S. Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off. 1971

This item is not available through EZBorrow. Please contact your institution’s interlibrary loan office for further assistance.
Government Document Book
19
Harrisburg, Pa. : Susquehanna River Basin Commission, 1975

Book
20
Washington, Environmental Protection Agency, Office of Water Programs, Division of Applied Technology, Rural Wastes Branch; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1972

Book