|aThe state of the world's parks : |ban international assessment for resource management, policy, and research / |cGary E. Machlis and David L. Tichnell ; foreword by Hal K. Eidsvik
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|aBoulder, Colo : |bWestview Press, |cc1985
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|axiv, 131 p ; |c24 cm
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|aIncludes bibliographical references (p. 111-124) and index