Pino, John A., Michael S. Strauss, Ted J. Davis, and Isabelle A. Schirmer. (1987) 1987. “The Preservation of Germplasm”. In Sustainability Issues in Agricultural Development: Proceedings of the Seventh Agriculture Sector Symposium, 252-69. Washington, DC: World Bank. http://documents.worldbank.org/curated/en/686471468764390337/Sustainability-issues-in-agricultural-development-proceedings-of-the-seventh-agriculture-sector-symposium.