Sánchez, David A. Lecture notes on ordinary differential equations/ prepared by David A. Sánchez ; used in conjunction with Mathematics 203, winter quarter, 1965. - [Chicago]: University of Chicago Press, [1965]. - 55 p.: ill.; 29 cm. Bibliography: p. 49. Subjects--Topical Terms: Differential equations. Dewey Class. No.: 515.35 / S211l