@PROCEEDINGS {OLUNUGA:1978a, title = {Weed Problems and Control Practices in Field and Vegetable Crops in Nigeria}, author = {Olunuga, B. A. and Akobundu, I. }, booktitle = {Presented at the International Weed Science Conference, IITA, Ibadan. July 3 - 7, 1978}, year = {1978}, }