Technology impact evaluation in agroforestry projects /
S.J. Sche rr and E.U. Muller.
- Nairobi : International Council for Research in Agroforestry, 1991.
- 257 p. : ill., tables ; 23 cm.
- ICRAF reprint ; no. 81 .
Reprinted from Agroforestry systems, 13: 235-57, 1991.