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1.
State of the World's Parks: An International Assessment for Resource Management, Policy and ... by Machlis, Gary, Tichnell, David ISBN: 9780813302744 List Price: $45.00
2.
The State Of The World's Parks: An International Assessment For Resource Management, Policy,... by Gary E Machlis, David L. Ti... ISBN: 9780367296346 List Price: $149.95