TY  - BOOK
AU  - Waksman,Selman A.
TI  - Microbiological Analysis of Soil as an Index of Soil Fertyliti
PY  - 1922///
CY  - New Jersey, 
N1  - Contiene:    Vol.III:Influence of fertilization upon numbers of microorganisms in the soil     Vol.VI: Nitrification
ER  -