TY - BOOK ID - 145587073 TI - Economics of outdoor recreation AU - Clawson, Marion AU - Knetsch, Jack L. PY - 1971 PB - Baltimore : Johns Hopkins Press, DB - UniCat KW - Outdoor recreation. UR - https://www.unicat.be/uniCat?func=search&query=sysid:145587073 AB - ER -