| Online link | https://doi.org/10.3133/ofr02156 |
|---|---|
| Description | Geologic and mineral resource information for 1635 deposits of phosphate worldwide |
| Originators | Chernoff, Carlotta B., Orris, Greta J. |
| Publication | U.S. Geological Survey Open-File Report 2002-156 |
| Metadata | Questions and answers |