Title: Proceedings of the Twelfth Lunar and Planetary Science Conference, Houston, Texas, March 16-20, 1981 (Geochimica Et Cosmochimica ACTA)
Subjects: Lunar geology, Congresses, Planets, Geology, Meteorites, Géologie lunaire, Congrès, Planètes, Géologie, Météorites, Geologia planetaria