TY  - BOOK
AU  - Subba Rao, N. S. 
TI  - Soil microorganisms and plant growth
U1  - 631.46 SUB 
PY  - 1977///.
CY  - New Delhi : 
PB  - Oxford, 
KW  - Soil microbiology
KW  - Nitrogen-fixing microorganisms
ER  -