Fry, T. C. 1. (1929). Elementary differential equations. New York: D. Van Nostrand Company, Inc..
Citación estilo ChicagoFry, Thornton Carle 1892-1991. Elementary Differential Equations. New York: D. Van Nostrand Company, Inc., 1929.
Cita MLAFry, Thornton Carle 1892-1991. Elementary Differential Equations. New York: D. Van Nostrand Company, Inc., 1929.
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