TY  - BOOK
AU  - Sprent, Janet I.
AU  - Sprent, Peter.
TI  -  Nitrogen fixing organisms: pure and applied aspects 
SN  - 041234680X
U1  - 589.9/0133 20
PY  - 1990///
CY  - London,  New York
PB  - Chapman and Hall
KW  - Nitrogen-fixing microorganisms
KW  - Nitrogen
KW  - Fixation
N1  - Includes bibliographical references (p. 218-249) and index
ER  -