TY - RPRT TI - Rare earths, thorium, and other minor elements in sphene from some plutonic rocks in west-central Alaska AU - Mortimer H. Staatz AU - Nancy M. Conklin AU - Isabelle K. Brownfield PY - 1977 UR - https://pubs.usgs.gov/publication/70164404 ID - 70164404 ER -