@INPROCEEDINGS {HAHN:1976c, title = {Cooperative testing and selection}, author = {Hahn, S. K. }, booktitle = {The International Exchange and Testing of Cassava Germ Plasm in Africa: proceedings of an interdisciplinary workshop held at IITA, Ibadan, Nigeria, 17-21 November, 1975 edited by Terry, E. and R. MacIntyre}, year = {1976}, month = {November}, pages = {39--40}, publisher = {International Development Research Centre (IDRC)}, location = {Ottawa, Canada}, note = {RTB; Root and Tuber; Cassava}, }