Author
- Alliance for Watershed Education of the Delaware River 1 results
- American Association for the Advancement of Science 1 results
- American Imprint Collection (Library of Congress) 1 results
- Aycrigg, Benjamin 1 results
- Baer, George F. (George Frederick), 1842-1914 1 results
- Bailey, Lydia R., 1779-1869 3 results
- Baldwin, Loammi, 1780-1838 2 results
- Bascom, F. (Florence), 1862-1945 1 results
- Beckel, Charles N. 2 results
- Benson, Barbara E. (Barbara Ellen), 1943- 1 results
- Bethlehem (Pa.) Committee on Water Works 1 results
- Bethlehem, Pa Committee on Water Works 1 results
- Bibbins, James Rowland, 1877-1936 1 results
- Binney, Horace, 1780-1875 1 results
- Birkinbine, Henry P. M. 1 results
- Birkinbine, Henry P. N. 1 results
- Blake, Nelson Manfred, 1908-1996 1 results
- Blockley Township (Philadelphia County, Pa.) Board of Commissioners 1 results
- Boston (Mass.) Water Commissioners 1 results
- Boston Commissioners to Devise a Plan for Supplying the City With Pure Water 1 results
- Boye, Martin H. (Martin Hans), 1812-1909 1 results
- Bureau of Municipal Research (Philadelphia, Pa.) 2 results
- Camden (N.J.). Water Department 1 results
- Centre Square Water Works (Philadelphia, Pa.) 1 results
- Cresson, Charles M. 1 results
- Cresson, Charles M. (Charles Massey), 1828-1893 1 results
- Davis, Drew K. 1 results
- Delaware and Schuylkill Canal Company 1 results
- Duttenhofer, A. 1 results
- Eberlein, Harold Donaldson, 1875-1964 1 results
- Eleutherian Mills Historical Library 1 results
- Eltonhead, William B. 1 results
- Erdmann, Frederick 2 results
- Ferguson, John Henry, 1907- 1 results
- Foster, Margaret Dorothy, 1895- 1 results
- Fuller, George W. 1 results
- Gallagher, C. H. 1 results
- Geological Survey (U.S.) 1 results
- Geological Survey (U.S.). Water Resources Division 1 results
- Geological Survey of Pennsylvania 1 results
- Gibson, Jane Mork 1 results
- Graff, Frederic, 1775-1847 1 results
- Graff, Frederick, 1775 1 results
- Graff, Frederick, 1775-1847 1 results
- Gray, Samuel Merrill 1 results
- Greenman, D. W. (David W.) 1 results
- Hall, George Martin, 1891-1941 1 results
- Harris, Joseph S. 1 results
- Hasskarl, Joseph F. 1 results
- Haworth, James 4 results more…