TY  - BOOK
AU  - Jacob,A.
TI  - Magnesia: der funfte pflanzenhauptnahrstoff 
AV  - S592.6.M3 J33 
PY  - 1955///
CY  - [Place of publication not identified]
PB  - Ferdinand Enke Verlag Stuttgart
KW  - Magnesium
KW  - Soil chemistry
KW  - Soil science
N1  - Includes index
ER  -