Lunar and Planetary Science Conference.Lunar and Planetary Science Conference (12th : 1981 : Texas)：Proceedings of the 12th Lunar and Planetary Science Conference, Houston, Texas, 1981, Section 1: the moon.Pergamon Pr.,1982.
Lunar and Planetary Science Conference (12th : 1981 : Texas)：Proceedings of the 12th Lunar and Planetary Science Conference, Houston, Texas, 1981, Section 1: the moon
Lunar and Planetary Science Conference.Pergamon Pr.,1982.
Lunar and Planetary Science Conference.Lunar and Planetary Science Conference (12th : 1981 : Texas)：Proceedings of the 12th Lunar and Planetary Science Conference, Houston, Texas, 1981, Section 2: the moon.Pergamon Pr.,1982.
Lunar and Planetary Science Conference (12th : 1981 : Texas)：Proceedings of the 12th Lunar and Planetary Science Conference, Houston, Texas, 1981, Section 2: the moon
Lunar and Planetary Science Conference.Pergamon Pr.,1982.
