Economics of watershed planning - Tolley, George S. 1925-; Riggs, Fletcher E. 1923- (Iowa State University Press, 1961)
Aus dem Vorwort: "... representatives of public agencies and universities assembled in Knoxville, Tennessee, in June 1959, for the Symposium on the Economics of Watershed Planning. This book cantains the proceedings of the Symposium."
Hier auch später erschienene, unveränderte Nachdrucke