TY  - BOOK
AU  - BLACK (C A) and others.
TI  - Methods of soil analysis. Part 1and 2. Chemical and microbiological properties
U1  - 631.4 BLAM 
PY  - 1965///
CY  - U S A.
PB  - American Society of Agronomy.
KW  - Soil Science
ER  -