Water resources data. Maryland and Delaware. - Geological Survey (U.S.). (USGS water resources data.Maryland and Delaware, 1981)
Vols. for 1981-198 prepared in cooperation with the states of Maryland and Delaware, Geological Survey, Water Resources Division, and with other agencies; <1986-> in cooperation with the states of Maryland and Delaware and with other agencies.
Microfiche copy: Microfiche. Washington, D.C. : U.S. Govt. Print. Off. microfiches : negative ; 11 x 15 cm.
Keywords: Water quality / Delaware / Statistics / Periodicals.; Water quality / Maryland / Statistics / Periodicals.; Stream measurements / Delaware / Statistics / Periodicals.; Stream measurements / Maryland / Statistics / Periodicals.