Publications of the Lick Observatory.
Lick Observatory.
Astronomy.
Halley's comet
Comets.
Solar system.
Menzel, Donald H. (Donald Howard), 1901-1976
Campbell, William Wallace, 1862-1938.
Bobrovnikoff, Nicholas T. (Nicholas Theodore), 1896-
A study of the solar chromosphere.
Halley's Comet in its apparition of 1909-1911.