@BOOKLET {WOOMER:2010c, title = {Biological nitrogen fixation and grain legume enterprise: guidelines for N2Africa master farmers}, author = {Woomer, P. L. and N2Africa, }, year = {2010}, address = {N2Africa}, howpublished = {Master farmer guidelines BNF-GL}, note = {N2Africa Project; 22p. CRP Grain Legumes; Legume}, }