TY  - BOOK
AU  - Bergersen, F. J., ed.
TI  - Methods for evaluating biological nitrogen fixation
SN  - 0471277592
U1  - 572.545 21st ed.
PY  - 1980///
CY  - Chichester
PB  - John Wiley and Sons
KW  - Nitrogen fixation
N1  - Index: p. 681-702
ER  -