TY  - RPRT
TI  - Rare earths in phosphorites: Geochemistry and potential recovery
AU  - Z. S. Altschuler
AU  - Sol Berman
AU  - Frank Cuttitta
PY  - 1966
DO  - 10.3133/ofr663
UR  - https://pubs.usgs.gov/publication/ofr663
ID  - ofr663
ER  -