@BOOKLET {WOOMER:2010a, title = {Biological nitrogen fixation and grain legume enterprise: guidelines for N2Africa lead farmers}, author = {Woomer, P. L. and N2Africa, }, year = {2010}, address = {N2Africa}, howpublished = {Lead farmer guidelines southern Africa}, note = {N2Africa Project; CRP Grain Legumes; 23p.}, }