TY  - RPRT
TI  - Undiscovered phosphate resources in the Caribbean region and their potential value for agricultural development
AU  - Richard Porter Sheldon
AU  - D.F. Davidson
AU  - S.R. Riggs
AU  - W. C. Burnett
PY  - 1985
DO  - 10.3133/cir962
UR  - https://pubs.usgs.gov/publication/cir962
ID  - cir962
ER  -