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1by Vermeulen, J.B. (comp.), Plant Protection Research Inst., Pretoria (South Africa) eng, Greyling, J. (comp.)
Published 1990Texto bibliotecaFAO IT -
2by Vermeulen, J.B. (comp.), Department of Agriculture, Pretoria (South Africa) eng, Dreyer, M. (comp.), Grobler, H. (comp.)
Published 1993Texto bibliotecaFAO IT -
3by Vermeulen, J.B. (comp.), Department of Agriculture, Pretoria (South Africa) eng, Grobler, H. (comp.), Van Zyl, K. (comp.)
Published 1998Texto bibliotecaFAO IT