Newell, Wayne L. Understanding natural systems : a perspective for land-use planning in Appalachian Kentucky / by Wayne L. Newell - Washington, D.C. : U.S. Geological Survey, 1978 - iv, 50 p. : ill. ; 24 cm. - Geological Survey bulletin ; no.1438 . Bibliography: p. 49-50 Subjects--Topical Terms: Geology--KentuckyLand use--Planning--Kentucky Dewey Class. No.: 557.308