TY  - BOOK
AU  - "Black, C.A.,Et al�"
TI  - Methods of Soil analysis.Part II : Chemical &  Micrological properties  (Agronomy Monographs No. 9) 2nd printing 1969
U1  - 6131.42   K5.2 
PY  - 0000///"Madison, Wisconsin"
CY  - 1965
PB  - American Soc. Agronomy
ER  -