@ARTICLE {SANGINGA:1990,
title = {Assessment of genetic variability for N2 fixation between and with provenance of Leucaena leucocephala and Acacia albida estimated by 15N labelling techniques},
author = {Sanginga, N. and Bowen, G. D. and Danso, S. K. A. *},
journal = {Plant and Soil},
year = {1990},
volume = {127},
pages = {169--178},
}