Heichel, G., & Francis, C. (1971). Efficiency of energy use in producing maize with different technologies. International Center for Tropical Agriculture.
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Cita Chicago Style (17a ed.)
Heichel, GH, y C.A Francis. Efficiency of Energy Use in Producing Maize with Different Technologies. International Center for Tropical Agriculture, 1971.
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Cita MLA (9a ed.)
Heichel, GH, y C.A Francis. Efficiency of Energy Use in Producing Maize with Different Technologies. International Center for Tropical Agriculture, 1971.
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