Niveles de nitrogeno foliar en cuatro comunidades vegetales en el valle de Tehuacan, Pueb. Mexico
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| Format: | Tesis de licenciatura |
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MX
2001
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| Online Access: | https://hdl.handle.net/20.500.14330/TES01000294075 http://132.248.9.195/pd2001/294075/Index.html |