1. Zodiacal Dust: Measurements by Mariner IV
2. Interplanetary dust particle flux measurements between 1.0 and 1.5 AU from Mariner 4 cosmic dust experiment;preprint, fifth Western National Meeting program of American Geophysical Union,1965
3. BALDWIN, R.B., LUNAR CRATER COUNTS, ASTRONOMICAL JOURNAL 69: 377 (1964).
4. Baldwin, R. B., The Face of the Moon: CH12 (1949).
5. The Measure of the Moon 1963