NOVAE IN THE SPIRAL NEBULAE AND THE ISLAND UNIVERSE THEORY

Heber D. Curtis

© 1917. The Astronomical Society of the Pacific. All rights reserved. Printed in U.S.A.
Publications of the Astronomical Society of the Pacific, Volume 29, Number 171 Citation Heber D. Curtis 1917 PASP 29 206 DOI 10.1086/122632