TY  - BOOK
TI  - Sulphur Institute journal: Sulphur in agriculture 
SN  - 0039-4904
CY  - The Sulphur Institute, 
PB  -  1725 K St., N.W., Washington, D.C., 
KW  - Sulfur
KW  - Periodicals
KW  - Plants
KW  - Effect of sulfur on
ER  -