Introductory course in differential equations : for students in classical and engineering colleges / by Daniel A. Murray. Murray, Daniel A. (Daniel Alexander), 1862-1934. Differential equations. QA371 .M98x 1928 517.38 MUI Includes bibliographical references and indexes. New York : Longmans, Green and Co., 1897, c1924. 1897, c1924. 1928 Text xvi, 236 p. : eng