TY  - BOOK
AU  - Samuel L. Tisdale
AU  -  Werner L. Nelson, 
TI  - Soil fertility and fertilizers. Ed 3
SN  - 0-02-420860-4
U1  - 631.42 
PY  - 1975///
CY  - New York
PB  - Macmillan Publishing Co Inc
ER  -