TY  - BOOK
AU  - Broughton,W.J.
TI  - Nitrogen fixation: rhizobium. 
SN  - 0-19-854552-5
AV  - AMU QR89.7.N57 
PY  - 1982///
CY  - Oxford
PB  - Clarendon Press
KW  - Nitrogen
KW  -  Fixation
N1  - Includes bibliographical references
ER  -