1. Economics of outdoor recreation
Author: by Marion Clawson and Jack L. Knetsch. Baltimore, Published for Resources for the Future by John Hopkins Press
Library: Library of the Faculty of Economics University of Tehran (Tehran)
Subject: Outdoor recreation-Economic aspects
Classification :
GV
182
.
2
.
C55
2. Economics of outdoor recteation
Author: / by Marion Clawson and Jack L. Knetsch
Library: Central Library and Archive Center of shahid Beheshti University (Tehran)
Subject: Outdoor recteation - Economic aspects
Classification :
333
.
780
973
C617
3. Outdoor recreation and water resources planning
Author: Knetsch, Jack L., 3391-
Library: Central Library and Documents Center of Industrial University of Khaje Nasiredin Toosi (Tehran)
Subject: ، Aquatic sports,، Water resources development,، Outdoor recreation
Classification :
GV
778
.
K57
