Hellin, J. (2006). Better land husbandry: From soil conservation to holistic land management. Science Publishers.
Citace podle Chicago (17th ed.)Hellin, Jon. Better Land Husbandry: From Soil Conservation to Holistic Land Management. Enfield, NH: Science Publishers, 2006.
Citace podle MLA (9th ed.)Hellin, Jon. Better Land Husbandry: From Soil Conservation to Holistic Land Management. Science Publishers, 2006.
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