The state of national parks in the neotropical realm : a preliminary report prepared for the IUCN
1986
Machlis, Gary E. |
Neumann, Roderick P. |
Machlis, Gary E.
Social science and protected area management : the principles of partnership
Machlis, Gary E. |
Extended GAP analysis : a technique for biodiversity management of protected area systems
Machlis, Gary E. |
Forester, Deborah |
On interpretation : sociology for interpreters of natural and cultural history
1992
Machlis, Gary E. |
Field, Donald R. |
The state of the world's parks : an international assessment for resource management, policy and research
1985
Machlis, Gary E. |
Tichnell, David L. |
Friends of the National Parks : a report on friends group throughout the National Park System
1993
Machlis, Gary E. |
Medlin, Nancy C. |
Protected area management and planning in China : a training manual, working draft
1988
Machlis, Gary E. |
Marsh, John |