Biblio
. 1894. “The Polar Cap Of Mars”. Astronomy And Astrophysics. Astronomy And Astrophysics.
. 1899. “Mars.”.
. 1907. “The Illusions Of Vision And The Canals Of Mars”. Popular Science Monthly. Popular Science Monthly.
. 1907. “Is Mars Inhabited?”. The Harvard Illustrated Magazine Vol. VIII (No. 6). The Harvard Illustrated Magazine.

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