Putnam, William Lowell. The explorers of Mars Hill : a centennial history of Lowell Observatory, 1894-1994 / William Lowell Putnam and others.

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Putnam, William Lowell.

The explorers of Mars Hill : a centennial history of Lowell Observatory, 1894-1994 / William Lowell Putnam and others.

Lowell Observatory -- History.

Institutional History