Distribution and ages of Magellanic CepheidsDOI: info:10.5479/si.00810231.16.28v. 16Smithsonian Institution28–32
Gaposchkin, Cecilia Helena Payne. 1974. "Distribution and ages of Magellanic Cepheids." Smithsonian Contributions to Astrophysics, 16 28–32. https://doi.org/10.5479/si.00810231.16.28.