TY  - BOOK
AU  - Bergersen,F.J.
TI  - Methods for evaluating biological nitrogen fixation
AV  - QR89.7 .M47
U1  - 589 
PY  - 1980///
CY  - Chichester [England] ; New York, Chichester [England] ; New York
PB  - J. Wiley
KW  - Nitrogen -- Fixation
KW  - Nitrogen-fixing microorganisms
N1  - "A Wiley-Interscience publication."; Includes indexes; Bibliography: p. 637-680
ER  -