Koerkle, E. H. (1996). Evaluation of agricultural best-management practices in the Conestoga River headwaters, Pennsylvania: Hydrology of a small carbonate site near Ephrata, Pennsylvania, prior to implementation of nutrient management. U.S. Geological Survey.
Chicago Style (17th ed.) CitationKoerkle, Edward H. Evaluation of Agricultural Best-management Practices in the Conestoga River Headwaters, Pennsylvania: Hydrology of a Small Carbonate Site Near Ephrata, Pennsylvania, Prior to Implementation of Nutrient Management. 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: Hydrology of a Small Carbonate Site Near Ephrata, Pennsylvania, Prior to Implementation of Nutrient Management. U.S. Geological Survey, 1996.