Koerkle, E. H. (1996). Evaluation of agricultural best-management practices in the Conestoga River headwaters, Pennsylvania: Effects of nutrient management on water quality in the Little Conestoga Creek headwaters, 1983-89. U.S. Geological Survey.
Chicago Style (17th ed.) CitationKoerkle, Edward H. Evaluation of Agricultural Best-management Practices in the Conestoga River Headwaters, Pennsylvania: Effects of Nutrient Management on Water Quality in the Little Conestoga Creek Headwaters, 1983-89. Lemoyne, Pennsylvania: U.S. Geological Survey, 1996.
MLA (9th ed.) CitationKoerkle, Edward H. Evaluation of Agricultural Best-management Practices in the Conestoga River Headwaters, Pennsylvania: Effects of Nutrient Management on Water Quality in the Little Conestoga Creek Headwaters, 1983-89. U.S. Geological Survey, 1996.