Catastrophe theory and its applications / Tim Poston and Ian Stewart. Poston, T. Stewart, Ian, 1945- joint author. Catastrophes (Mathematics) QA614.58 .P66 513.83 Includes index. Bibliography: p. 448-466. London ; San Francisco : Pitman, 1978. 1978. 1978 Text xviii, 491 p. : eng Surveys and reference works in mathematics ; 2