Author
Pennsylvania. Department of Highways
6 results
United States. Bureau of Public Roads
6 results
Dansereau, H. Kirk (Harry Kirk), 1921-
3 results
Geological Survey (U.S.)
3 results
Maiolo, John R., 1938-
3 results
Pennsylvania. Department of Transportation
3 results
Reed, Lloyd A.
3 results
Duane, William J. (William John), 1780-1865
2 results
Pennsylvania. State Conservation Commission
2 results
Sauerlender, O. H. (Owen Helwig)
2 results
United States. Federal Highway Administration
2 results
Baker, Norman L., 1926-
1 results
Burton, R.
1 results
Cawley, James S.
1 results
Cawley, Margaret
1 results
Donaldson, R. B. (Robert Bain), 1905-1975
1 results
Environmental Monitoring Systems Laboratory (Research Triangle Park, N.C.)
1 results
Eyerly, Raymond W.
1 results
Faris, John T. (John Thomson), 1871-1949
1 results
Frey, John C.
1 results
Gamble, Hays Bentley
1 results
Geological Survey (U.S.). Water Resources Division
1 results
Gratto, Charles P.
1 results
Hainly, Robert A.
1 results
Pennsylvania State University. Agricultural Experiment Station
1 results
Pennsylvania State University. Highway Impact Research Program
1 results
Pennsylvania Turnpike Commission. Incident Management Team
1 results
Pennsylvania. Department of Transportation. Office of Research and Special Studies
1 results
Pennsylvania. State University. Institute for Research on Land and Water Resources. Highway Impact Research Program
1 results
Raphael, David L.
1 results
Rehberg, Richard A.
1 results
Rockey, Melvin B.
1 results
Searight, Thomas B. (Thomas Brownfield)
1 results
Snyder, Richard R.
1 results
Suggs, J.
1 results
Twark, Richard D.
1 results
United States. Federal Highway Administration. Implementation Division
1 results
United States. National Park Service
1 results