<span class="mw-page-title-namespace">Template</span><span class="mw-page-title-separator">:</span><span class="mw-page-title-main">Hubble29a</span>
Elena & Fabrice's Web

A relation between distance and radial velocity among extra-galactic nebulae. E. Hubble in Proc. Natl. Acad. Sci. 15:168 (1929).