@ARTICLE {WILLIAMS:1976b,
title = {Major research needs in plant protection and plant quarantine in Africa},
author = {Williams, R. J. },
journal = {African Journal of Plant Protection},
year = {1976},
month = {October},
issn = {0379-6930},
note = {Interafrican Symposium on the Role of Plant Protection in Crop Improvement in Africa, Ibadan, Nigeria, 7-12 October, 1974},
}