1. International Institute of Tropical Agriculture (IITA), c/o L.W. Lambourn (UK) Ltd.; Carolyn House, 26 Dingwall Rd. Croydon CR9 3EE UK
2. Obafemi Awolowo; Ile-Ife Nigeria
3. INRAB/CRAN-INA; Benin Republic
4. IRAD; Yaounde Cameroon
5. SARI; Tamale Ghana
6. INERA; Bobo-Dioulosso Burkina Faso