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Science (New York, N.Y.)|January 30, 1970
Potassium, rubidium, strontium, barium, and rare-Earth concentrations in lunar rocks and separated phasesJ A Philpotts, C C SchnetzlerScience (New York, N.Y.)|January 28, 1972
Geochemistry of apollo 15 basalt 15555 and soil 15531C C Schnetzler, J A Philpotts, D F Nava, et al.Pageof 1