Columbia subject headings:
Astrophysicists--United States--Biography.
Astrophysics--United States--History.
Hale, George Ellery, 1868-1938.
Harvard subject headings:
Astronomers--United States--Biography
Astrophysicists--United States--Biography.
Astrophysics--United States--History.
Hale, George Ellery, 1868-1938.
Princeton subject headings:
Astrophysicists--United States--Biography.
Astrophysics--United States--History.
Hale, George Ellery, 1868-1938.