1. 12) Yates, M. G., Biochemistry of nitrogen fixation, In “The Biochemistry of Plants Vol. 5”, eds. Stumpf, P. K. and Conn, E. E., Academic Press, New York, pp. 1-64 (1980).
2. 15) Wilson, P. W. and Knight, S. G. “Experiments in bacterial physiology”, Burgess Publishing Co., Minnesota, p. 53 (1952).
3. 16) Sambrook, J., Fritsch, E. F., and Maniatis, T. “Molecular cloning: A laboratory manual, 2nd ed.”, Cold Spring Harbor Laboratory Press, New York (1989).
4. 20) Ausubel, F. M., Brent, R., Kingston, R. E., Moore, D. D., Seidman, J. G., Smith, J. A., and Struhl, K. “Current protocols in molecular biology”, John Wiley & Sons, Inc., New York (1987).