1.
Thackeray JF. Doubling the age and size of the universe at the IAU in Rome in 1952: Contributions by David Thackeray, Walter Baade and Harlow Shapley. S. Afr. J. Sci. [Internet]. 2020 Jan. 29 [cited 2024 Jul. 13];116(1/2). Available from: https://sajs.co.za/article/view/6363