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Managing outdoor recreation : case studies in the National parks
Robert E. Manning and Laura E. Anderson
Bok Engelsk 2012
Studies in outdoor recreation : search and research for satisfaction
Robert E. Manning
Bok Engelsk 2011
Reconstructing conservation : finding common ground
edited by Ben A. Minteer and Robert E. Ma...
Bok Engelsk 2003
Studies in outdoor recreation : search and reasearch for satisfaction
by Robert E. Manning
Bok Engelsk 1999
Studies in outdoor recreation : search and research for satisfaction
Robert E. Manning
Bok Engelsk 1986