The production, management and use of nitrogen fixing trees :
a manual for field trainers /
prepared by the Nitrogen Fixing Tree Association and Heifer Project International.
APA Citation
Heifer Project., Nitrogen Fixing Tree Association. (1993). The production, management and use of nitrogen fixing trees: a manual for field trainers. Paia, Hawaii: The Association.
MLA Citation
Heifer Project, and Nitrogen Fixing Tree Association. The Production, Management And Use of Nitrogen Fixing Trees: a Manual for Field Trainers. Paia, Hawaii: The Association, 1993.
Warning: These citations may not always be complete (especially for serials).