Olmsted, Denison, 1791-1859. An introduction to astronomy: designed as a textbook for the use of students in college / By Denison Olmstead and E. S. Snell.

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Olmsted, Denison, 1791-1859.

An introduction to astronomy: designed as a textbook for the use of students in college / By Denison Olmstead and E. S. Snell.

Astronomy.

Snell, E. S, (Ebenezer Strong), 1801-1876.