| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Conservation agriculture as practised in Kenya: two case studies. Laikipia District, Siaya District | 978-9966-7219-O-7 (9966-7219-O-8) | 2007 |
P.K. · P.P. · P W. · Paul K · Paul P. · Paul W. · Philip K. · W. K. · W.P.