1993
. 1993.
Community Biodiversity Development And Conservation Programme. Working Document No. 2. Wageningen: CGN [Centre for Genetic Resources, The Netherlands]. http://www.worldcat.org/oclc/862982694.
. 1993. 1992
. 1992.
1991
“An Heirloom In The Garden: Antique Fruits And Flowers Are Popping Up All Over”. Newsweek 118 (2): 66.
. 1991. 1981
“Proceedings Of The Kenya National Seminar On Agroforestry, Nairobi, Kenya, 12-22 November 1980”. [Nairobi, Kenya]: International Council for Research in Agroforestry (ICRAF). http://www.worldcat.org/oclc/10924821.
. 1981.