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1by De Silva, G.A.C., FAO, Rome (Italy). Agriculture Dept. eng, Ranaweera, N.F.C., Department of Agriculture, Peradeniya (Sri Lanka) eng
Published ndTexto bibliotecaFAO IT -
2by Ranaweera, N.F.C. 1423211772390, FAO, Bangkok (Thailand). Regional Office for Asia and the Pacific eng 177549, Suraweera, D.E.F. 1423211772389, De Silva, G.A.C. 1423211772388
Published 1983Texto bibliotecaFAO IT