Mayall, N. U. (Nicholas Ulrich), 1906-1993- Edwin Powell Hubble, 1889-1953 : a biographical memoir ...

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Mayall, N. U. (Nicholas Ulrich), 1906-1993-

Edwin Powell Hubble, 1889-1953 : a biographical memoir ...

Hubble, Edwin, 1889-1953.

Astronomers -- Biography.