00797nam0-22002771i-450-99000666310040332120001010000666310FED01000666310(Aleph)000666310FED0100066631020001010d--------km-y0itay50------baitay-------001yyRecreation economic decisionscomparing benefits and costsRichard G. WalshState College [Pennsylvania]VenturePubl. Inc.1986XIV, 635 p., 23 cmWalsh,Richard G.146357ITUNINARICAUNIMARCBK990006663100403321VI A 7191993FSPBCFSPBCRecreation economic decisions612793UNINAGEN01