TY  - BOOK
AU  - Newton, William Edward.
AU  - Orme-Johnson, William H.
TI  - Nitrogen fixation
U1  - 631.46 
PY  - 1980///
CY  - Baltimore, Md.
PB  - University Park
KW  - Nitrógeno
KW  - Fijación
KW  - Rhizobium
N1  - Contenido : v.1 Freed-living systems and chemical models.--v.2 Symbiotic associations and cyanobacteria
ER  -