TY  - BOOK
AU  - Notholt ,Arthur J.G
AU  - Hartley ,Kenneth
ED  - International Geological Correalation Programme
TI  - Phosphate rock: a  bibliography of world resources 
SN  - 0900117362
PY  - 1983///
CY  - London
PB  - Mining  Journal Books
KW  - Phosphate rock
KW  - Bibliography
ER  -