@ARTICLE {SANGINGA:1990a,
title = {Genetic variability in symbiotic nitrogen fixation within and between provenances of two Casuarina species using the 15N-labelling methods},
author = {Sanginga, N. and Bowen, G. D. and Danso, S. K. A. *},
journal = {Soil Biology and Biochemistry},
year = {1990},
volume = {22},
pages = {539--547},
}