1. The structure of discharge-recession curves
2. T.M. Berg, W.E. Edmunds, A.R. Geyer, A.D. Glover, D.M. Hoskins, D.B. MacLachlan, S.I. Root, W.D. Sevon, and A.A. Socolow , 1980 . Geologic Map of Pennsylvania. Map 1, Pennsylvania Geological Survey, Pennsylvania Department of Conservation and Natural Resources, Harrisburg, Pennsylvania.
3. Regionalized drought flow hydrographs from a mature glaciated plateau