Nemyt͡s︡kiĭ, V. V. 1900- Qualitative theory of differential equations, by V. V. Nemytskii and V. V. Stepanov. - Princeton, N.J., Princeton University Press, 1960. - 523 p. illus. 24 cm. - Princeton mathematical series, 22 . Includes bibliography. Nat. Bib. No.: GB61-8893 Subjects--Topical Terms: Differential equations.Dynamics. Dewey Class. No.: 515.35 NEM