Author
Philadelphia (Pa.). Councils. Watering Committee
7
Philadelphia Record
6
Pennsylvania Supreme Court Eastern District
5
Philadelphia
5
Philadelphia (Pa.) Watering Committee
5
Philadelphia (Pa.). Councils
5
Philadelphia Watering Committee
5
Haworth, James
4
Pennsylvania Schuylkill Valley Railroad Company,
4
Bailey, Lydia R., 1779-1869
3
Latrobe, Benjamin Henry, 1764-1820
3
Lewis, Joseph S., 1778-1836
3
Philadelphia (Pa.)
3
Philadelphia Water Department
3
Rudolph, Sebastian A.
3
Stinson, Charles H.
3
Wallace, William S.
3
YA Pamphlet Collection (Library of Congress)
3
Baldwin, Loammi, 1780-1838
2
Beckel, Charles N.
2
Bureau of Municipal Research (Philadelphia, Pa.)
2
Erdmann, Frederick
2
Jenne, Lyle L.
2
McElroy, Samuel
2
Northern Liberties (Philadelphia County, Pa.) Water Commissioners
2
Pennsylvania
2
Pennsylvania Geological Survey
2
Philadelphia (Pa.) Committee of Ways and Means
2
Philadelphia Ordinances, etc
2
Rau, Robert
2
Spring Garden (Philadelphia County, Pa.) Water Commissioners
2
Thayer, William Watmough, 1862-1893
2
Trautwine, John C. 1810-1883
2
Water Research Foundation for the Delaware River Basin
2
Water Supply Commission of Pennsylvania
2
Wilmington (Del.). Water Department
2
Alliance for Watershed Education of the Delaware River
1
American Association for the Advancement of Science
1
American Imprint Collection (Library of Congress)
1
Aycrigg, Benjamin
1
Baer, George F. 1842-1914
1
Bascom, F. 1862-1945
1
Benson, Barbara E. 1943-
1
Bethlehem (Pa.) Committee on Water Works
1
Bethlehem, Pa Committee on Water Works
1
Bibbins, James Rowland, 1877-1936
1
Binney, Horace, 1780-1875
1
Birkinbine, Henry P. M.
1
Birkinbine, Henry P. N.
1
Blake, Nelson Manfred, 1908-1996
1
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