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31. Stratification of Delaware: Pennsylvania: Pennsylvania

2002. United States Department of Agriculture, National Agricultural. The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) area sampling frame is a delineation of all par...

32. Stratification of Maryland: Pennsylvania: Pennsylvania

2002. United States Department of Agriculture, National Agricultural. The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) area sampling frame is a delineation of all par...

33. Stratification of New Jersey: Pennsylvania: Pennsylvania

2002. United States Department of Agriculture, National Agricultural. The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) area sampling frame is a delineation of all par...

34. Stratification of New York: Pennsylvania: Pennsylvania

2002. United States Department of Agriculture, National Agricultural. The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) area sampling frame is a delineation of all par...

35. Stratification of Pennsylvania: Pennsylvania

2002. United States Department of Agriculture, National Agricultural. The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) area sampling frame is a delineation of all par...

36. Stratification of Virginia: Pennsylvania: Pennsylvania

2002. United States Department of Agriculture, National Agricultural. The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) area sampling frame is a delineation of all par...

37. Stratification of West Virginia: Pennsylvania: Pennsylvania

2002. United States Department of Agriculture, National Agricultural. The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) area sampling frame is a delineation of all par...

38. Total Petroleum Systems - National Assessment of Oil and Gas Project - Appalachian Basin Province (067) Total Petroleum Systems: Pennsylvania

2002. United States Geological Survey (USGS). The Total Petroleum System is used in the National Assessment Project and incorporates the Assessment Unit, which is the fundamental geologic unit ...

39. Urban Ecosystem Analysis Ikonos interpreted land cover for the Cobbs/Mill Creek and Tacony/Frankford Creek watersheds

2002. American Forests. AMERICAN FORESTS conducted an urban ecosystem analysis of the Delaware Valley region to provide community leaders with detailed information about t...