@INPROCEEDINGS {HAHN:1977, title = {Breeding of root and tuber crops}, author = {Hahn, S. K. and Howland, A. K. and Wilson, J. E. }, booktitle = {Proceedings of the First National Seminar on Root and Tuber Crops, Umudike, 21-25 March, 1977}, year = {1977}, pages = {36--47}, note = {RTB; Root and Tuber.; Proceedings of the First National Seminar on Root and Tuber Crops, Umudike, 21-25 March, 1977.}, }