"Letter to the Hon. R.W. Thompson, Secretary of the Navy, announcing the discovery of satellites of Mars"@en
"Letter to the Hon. R.W. Thompson, secretary of the Navy, announcing the discovery of satellites of mars"
"Letter to the hon. R.W. Thompson, secretary of the Navy, announcing the discovery of satellites of Mars ... Washington, August 21, 1877. [Signé : John Rodgers.]"
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