TY  - RPRT
TI  - Separation and preconcentration of the rare-earth elements and yttrium from geological materials by ion-exchange and sequential acid elution
AU  - J.G. Crock
AU  - F.E. Lichte
AU  - G. O. Riddle
AU  - C.L. Beech
PY  - 1986
DO  - 10.1016/0039-9140(86)80137-0
UR  - https://pubs.usgs.gov/publication/70015618
ID  - 70015618
ER  -