Map titled "Geologic map and sections of the Letronne Region of the Moon," by C. H. Marshall, published by the United States Geological Survey, 1963. Part of the "Geology of the Moon: Letronne Region" series, map I-385 (LAC-75).
Map titled "Geologic map and sections of the Kepler Region of the Moon," by R. J. Hackman, published by the United States Geological Survey, 1962. Part of the "Geology of the Moon: Keplar Region" series, map I-355 (LAC-57).
Report titled "Engineer special study of the surface of the Moon," by Robert J. Hackman and Arnold C. Mason, United States Geological Survey, 1961. Part of the Miscellaneous Geologic Investigations series, map I-351. Packet includes two maps; a third…