TY - RPRT TI - Rare earths and other trace elements in Apollo 14 samples. AU - Helmke, P. A. AU - Haskin, L. A. AU - Korotev, R. L. AU - Ziege, K. E. PY - 1972 UR - https://ntrs.nasa.gov/citations/19730034958 ID - 19730034958 ER -