TY  - BOOK
AU  - Sprent,Janet I.
AU  - Sprent,Peter
TI  - Nitrogen fixing organisms : pure and applied aspects
SN  - 0412346907
U1  - 589.90133 
PY  - 1990///
CY  - London
PB  - Chapman and Hall
KW  - Nitrogen-fixing microorganisms
KW  - Nitrogen -- Fixation
ER  -