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1987

Repetto, Robert. 1987. Managing Natural Resources For Sustainability. In Sustainability Issues In Agricultural Development: Proceedings Of The Seventh Agriculture Sector Symposium, 167-181. Washington, DC: World Bank. http://www.worldcat.org/oclc/925356016.

1976

Harwood, R. R., and E. C. Price. 1976. Multiple Cropping In Tropical Asia. In Multiple Cropping, 11-40. Madison, WI: ASA [American Society of Agronomy]. http://www.worldcat.org/oclc/842231973.