The Fifty-seventh Meeting of the AAS was held at Hood College, Frederick, Maryland, from Monday to Wednesday, December 28–30, 1936 at the invitation of Leah B. Allen, Professor of Astronomy. «Archived copy». Archivado desde el original el 13 de mayo de 2008. Consultado el 26 de junio de 2009.
The Fifty-seventh Meeting of the AAS was held at Hood College, Frederick, Maryland, from Monday to Wednesday, December 28–30, 1936 at the invitation of Leah B. Allen, Professor of Astronomy. «Archived copy». Archivado desde el original el 13 de mayo de 2008. Consultado el 26 de junio de 2009.