1. PLUCKNETT, D. L. 1979. Small-Scale Processing and Storage of Tropical Root Crops. Westview Press, Boulder, Colorado. 461 pp.
2. ALBA, M. G. 1937. Philipp. Agric. 25, 782.
3. ASICO, P. M. 1941. Philipp. Agric. 29, 706.
4. AUMAITRE, A. 1969. Ann. Zootech. 18(4), 885.
5. BUITRAGO, J., and I. JIMÉNEZ. 1968. Unpublished data. ICA, Cali, Colombia.