Berger, Melvyn S. Perspectives in nonlinearity; an introduction to nonlinear analysis [by] Melvyn Berger and Marion Berger. - New York, W. A. Benjamin, inc. 1968. - 189 p. 24 cm. - Mathematics lecture note series . Subjects--Index Terms: Mathematical analysis Nonlinear theories Dewey Class. No.: 517 / BER