Text ( visual ) : unmediated Lunar and planetary science XXII : abstracts of papers submitted to the twenty-second Lunar and Planetary Science Conference, March 18-22, 1991 / compiled by the Lunar and Planetary Institute. -- pt. 1 : A-Ha ; pt. 2 : He-Pa ; pt. 3 : Pe-Z ; pt. [4] : PRESS ABSTRACTS. -- Houston : Lunar and Planetary Institute , [1991]. -- 3 v. : ill. ; 28 cm. -- Includes bibliographical references and indexes ; Sponsored by: Lunar and Planetary Institute, NASA/Johnson Space Center, American Association of Petroleum Geologists, American Geophysical Union, Division for Planetary Science of the American Astronomical Society, Geological Society of America, International Union of Geological Sciences, Meteoritical Society. -- (BA13112452) ; https://ci.nii.ac.jp/ncid/BA13112452 Author Heading(s): Lunar and Planetary Science Conference ; United States. National Aeronautics and Space Administration ; Lunar and Planetary Institute ; Lyndon B. Johnson Space Center. -- Classification(s): LCC : QB592 ; DC : 559.9/1