TY  - GEN
AU  - Sprent, Janet L
TI  - Biology of nitrogen fixation
T2  - European plant biology series
SN  - 0070840881
U1  - 631.847 SPR 
CY  - London, Mc Graw- Hill Book Company Inc
KW  - Nitrogen fixation/ biological nitrogen fixation - metabolism/ nitrogen - fixation - agriculture
ER  -