La investigacion agricola en el Distrito Federal N-19 del istmo de tehuantepec, Oax. su problematicia y posible solucion
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| Format: | Tesis de licenciatura |
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MX
1979
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| Online Access: | https://hdl.handle.net/20.500.14330/TES01000009645 http://132.248.9.195/pmig2019/0009645/Index.html |