Withers, L. A., & Williams, J. (1981). Crop genetic resources - the conservation of difficult material: Proceedings of an international workshop, 8-11 September 1980, University of Reading, U.K.
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Cita Chicago Style (17a ed.)
Withers, Lyndsey A., y J.T Williams. Crop Genetic Resources - the Conservation of Difficult Material: Proceedings of an International Workshop, 8-11 September 1980, University of Reading, U.K. 1981.
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Cita MLA (9a ed.)
Withers, Lyndsey A., y J.T Williams. Crop Genetic Resources - the Conservation of Difficult Material: Proceedings of an International Workshop, 8-11 September 1980, University of Reading, U.K. 1981.
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