TY - BOOK AU - Wyrick,Graville G. AU - Borchers,James W. TI - Hydrologic effects of stress relief tracturing in an appalachian valley U1 - 551.480973 PY - 1981/// CY - Washington, D. C. PB - United States Government Printing Office KW - Hydrology KW - United States KW - Watersheds ER -