Making sustainability operational :
Fourth Mexico/U.S. Symposium = Haciendo operacional a la sostenibilidad : Cuarto Simposio Mexico/EUA : April 19-23, 1993, Santa Fe, New Mexico /
technical coordinators, Hugo Manzanilla ... [et al.] ; sponsors, Instituto Nacional de Investigaciones Forestales y Agropecuarias, Secretaria de Agricultura y Recursos Hidraulicos, U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station and Southwestern Region.

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