Proceedings of the National Academy of Sciences. Volume 15, No. 3. [Washington, D.C.:] Carnegie Institution, 1929." /> HUBBLE, Edwin (1889-1953). "A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae." Offprint from: <I>Proceedings of the National Academy of Sciences</I>. Volume 15, No. 3. [Washington, D.C.:] Carnegie Institution, 1929. | Christie's