Title
Status yields and trends of nutrients and sediment and methods of analysis for nontidal data-collection programs, Chesapeake Bay basin, 1985-96 [microform] / by Michael J. Langland, Robert E. Edwards, and Linda C. Darrell.
Published
Lemoyne, Pa. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, Colo. : Branch of Information Services [distributor], 1998.