Levinson A A Ed. Proceedings of the second lunar science - 1971 - p. cm. - Grochimica et cosmochimica acta: Journal of the geochemical society and the metaoritical society: supplement; 2 . Standard No.: 31196 Source: Textual Subjects--Topical Terms: Moon Dewey Class. No.: B92p1:N71, L1.1-;L1.3