| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Assessment of the Economic Impact of Sorghum Variety S 35 in Chad | 978-92-9066-408-6 (92-9066-408-8) | 1999 |
| Impact of Germplasm Research Spillovers: the Case of Sorghum Variety S 35 in Cameroon and Chad | 978-92-9066-377-5 (92-9066-377-4) | 1999 |