TY  - BOOK
AU  - Sheldrick William F
AU  -  Stier William F
TI  - World potash survey
T2  - "World Bank Staff, working pape, 293"
U1  - "X9(F112).1.N7, F7/UN" 
PY  - 1978///
CY  - Washington
PB  - D C World Bank    
KW  - Technological Industry
N1  - Bibliography P 68-70
ER  -