Lanthanide series rare earths : an annotated list of unclassified references.

AEC Report No. TID-3029.

Rare earths; the fraternal fifteen

Cover title.

Has the earth's crust changed with time? : rare earth abundances in ancient sediments /

"May 1967."

Introduction to the rarer elements,

"Published works of Philip E. Browning": p. 251-255.

The sedimentary carbonate-hosted giant Bayan Obo REE-Fe-Nb ore deposit of Inner Mongolia, China : a cornerstone example for giant polymetallic ore deposits of hydrothermal origin /

Mode of access: Internet.

Radioactive mineral deposits of Wyoming /

"April, 1960."