Osterbrock, D. E. (1997). Yerkes Observatory, 1892-1950: The birth, near death, and resurrection of a scientific research institution. University of Chicago Press.
Cóipeáladh chuig an ngearrthaisce go rathúil é
Níorbh fhéidir cóipeáil chuig an ngearrthaisce
Lua i Stíl Chicago (17ú heag.)
Osterbrock, Donald E. Yerkes Observatory, 1892-1950: The Birth, Near Death, and Resurrection of a Scientific Research Institution. Chicago: University of Chicago Press, 1997.
Cóipeáladh chuig an ngearrthaisce go rathúil é
Níorbh fhéidir cóipeáil chuig an ngearrthaisce
Lua MLA (9ú heag.)
Osterbrock, Donald E. Yerkes Observatory, 1892-1950: The Birth, Near Death, and Resurrection of a Scientific Research Institution. University of Chicago Press, 1997.
Cóipeáladh chuig an ngearrthaisce go rathúil é
Níorbh fhéidir cóipeáil chuig an ngearrthaisce
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.