TY  - BOOK
AU  - Samuel L. Tisdale
AU  -  Werner L. Nelson James D. Beaton  John L. Havlin
TI  - Soil fertility and fertilizers
SN  - 81-203-0975-8
U1  - 631.42 
PY  - 1993///
CY  - New Delhi
PB  - Prentice Hall of India ( P ) Limited
ER  -