TY  - BOOK
AU  - Pontificia Academia Scientiarvm
TI  - Study week on organic matter and soil fertility
U1  - 631.422 
PY  - 1968///
CY  - New York.
PB  - North-Holland Pub.
KW  - Soil fertility,Aciditiy,Alkality
KW  - Soil Chemistry
ER  -