@PROCEEDINGS {PULVER:1978, title = {IITA's Program on Dinitrogen Fixation}, author = {Pulver, E. and Brockman, F. and Nangju, D. and Wien, H. C. }, booktitle = {Meeting of Advisory Group on Potential Uses of Isotopes in the Study of Biological Dinitrogen Fixation}, year = {1978}, address = {Vienna}, }