Forest service research accomplishments 1975
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Format: | Texto biblioteca |
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Washington : Forest Service,
1976
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Subjects: | EROSION, CONTAMINACION, ECOLOGIA, RECURSO HIDRICO, BOSQUES, PROTECCION DE MADERA, RECURSOS FORESTALES, SISTEMA SILVICULTURAL, ECONOMIA REGIONAL, CONTROL DEL FUEGO, DEGRADACION BIOLOGICA, PRODUCTO DE FIBRA, , |
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