by U.S. Dept. of the Interior, U.S. Geological Survey, [Branch of Information Services, distributor in [Denver, Colo.] .
Written in English
|Other titles||Drought trigger ground water levels and analysis of historical water level trends in Chester County, Pennsylvania|
|Statement||by Curtis L. Schreffler ; prepared in cooperation with the Chester County Water Resources Authority.|
|Series||Water-resources investigations report -- 97-4113|
|Contributions||Chester County Water Resources Authority., Geological Survey (U.S.)|
|The Physical Object|
|Pagination||1 folded sheet (6 p.) :|