Comstock, G. C. (1901). A text-book of astronomy. New York: D. Appleton and company.
Citación estilo ChicagoComstock, George Cary. A Text-book of Astronomy. New York: D. Appleton and company, 1901.
Cita MLAComstock, George Cary. A Text-book of Astronomy. New York: D. Appleton and company, 1901.
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