Autore:Harlow Shapley
Aspetto

- ↑ 1,0 1,1 Bibliothèque nationale de France
- ↑ 2,0 2,1 SNAC
- ↑ 3,0 3,1 Encyclopædia Universalis
- ↑ 4,0 4,1 Internet Speculative Fiction Database
- ↑ Brockhaus Enzyklopädie
- ↑ Grande Enciclopedia Sovietica 1969–1978
Shapley astronomo statunitense