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Computer-plotted map of land use and land cover, three mile island and vicinity, with census tracts
(Washington: Government Printing Office, 2015)
Proceedings of university seminar on pollution and water resources
(Washington: Government Printing Office, 2015)
NAWQA national water-quality assessment program
(Washington: Government Printing Office, 2015)
Visual Geography
(Washington: Government Printing Office, 2015)
Nonpoint and point sources of nitrogen in major watersheds of the United States
(Washington: Government Printing Office, 2015)
The severity of an earthquake
(Washington: Government Printing Office, 2000)
Crusty's little book on biological soil crust
(Washington: Government Printing Office, 2015)
Types of maps
(Washington: Government Printing Office, 2015)
Volunteer for science
(Washington: Government Printing Office, 2015)
Volunteer for science
(Washington: Government Printing Office, 2015)