TY  - BOOK
AU  - Nutman, P S
TI  - Symbiotic nitrogen fixation in plants
SN  - 0521206456
U1  - 589.7 
PY  - 1976///
CY  - London
PB  - Cambridge university press
KW  - Genetical aspects and taxonomy
KW  - Quality of legume in inoculants
ER  -