1. 1.R. Berendzen, 1970 . Case studies project on the development of modern astronomy. Papers presented at the annual meeting of National Sci. Teach. Asso. Cincinnati, and at the triennial meeting of the General Assembly of the International Astronomical Union. Brighton, England. Unpublished.
2. Book Review: Shapley: Octogenarian Reminiscences: Through Rugged Ways to the Stars
3. 4.R. Berendzen, and M. A. Hoskin. 1971 . Hubble's announcement of Cepheid variables in spiral nebulae. Leaflets of the Astron. Soc. Pacific, no. 504.
4. Hubble's Classification of Non-Galactic Nebulae, 1922–1926