Collatz, Lothar, 1910- The numerical treatment of differential equations./ - 3rd ed. - Berlin: Springer, 1960. - xv, 568 p. : ill. ; 25 cm. - Die grundlehren der mathematischen Wissenschaften in Elinzeldarstell ungen ; Bd 60. . Includes bibliographical references. Subjects--Topical Terms: Differential equations.-------- Dewey Class. No.: 515.35