23. The Cloud of Interplanetary Boulders, M. Harwit, in "The Zodiacal Light and the Interplanetary Medium." ed. J. L. Weinberg, NASA SP-150, p. 307, (1967).

23. The Cloud of Interplanetary Boulders, M. Harwit, in "The Zodiacal Light and the Interplanetary Medium." ed. J. L. Weinberg, NASA SP-150, p. 307, (1967)., Box: 21, Folder: 28. Martin Harwit papers, 14-7-2402. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/174374 Accessed January 24, 2026.