TY  - BOOK
AU  - Bergersen,F.J.
TI  - Methods for evaluating biological nitrogen fixation
SN  - 0471277592
PY  - 1980///
CY  - Chichester
PB  - J. Wiley
KW  - Nitrogen
KW  - Fixation
KW  - Nitrogen-fixing microorganisms
N1  - Includes indexes and bibliography; Closed
ER  -