Autore:James Gregory (astronomo)

- ↑ 1,0 1,1 A Short History of Astronomy
- ↑ 2,0 2,1 Gemeinsame Normdatei
- ↑ 3,0 3,1 Bibliothèque nationale de France
- ↑ 4,0 4,1 British Museum person-institution thesaurus
- ↑ 5,0 5,1 OpenLibrary
Gregory matematico/astronomo scozzese