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Permaculture: A Designers' Manual. Tyalgum, NSW, Australia: Tagari Publications. http://www.worldcat.org/oclc/945761643.
. 1988. D
“Seventeenth Century Organic Agriculture In China: Ii. Energy Flows Through An Agroecosystem In Jiaxing Region”. Human Ecology 14 (1): 15-28. doi:10.1007/BF00889208. http://www.jstor.org/stable/4602798.
. 1986.