TY  - BOOK
AU  - F.J Bergersen
TI  - Methods for evaluating biological Nitrogen fixation
SN  - 0-471-2775902
U1  - 589.95 
PY  - 1980///
CY  - New York
PB  - John Wiley & Sons
N1  - F.J Bergersen: Methods for evaluating biological Nitrogen fixation.  New York.  John Wiley & Sons, 1980. 0-471-2775902--(589.95BER)
ER  -