TY  - BOOK
AU  - Samuel L. Tisdale
AU  -  Werner L. Nelson, 
TI  - Soil fertility and fertilizers
U1  - 631.42 
PY  - 1968///
CY  - New York
PB  - Macmillan and Co
N1  - Samuel L. Tisdale & Werner L. Nelson: Soil fertility and fertilizers.  (2nd Edition)  New York.  Macmillan and Co, 1968.--(631.42TIS)
ER  -