Pars, L. A. An introduction to the calculus of variations / L. A. Pars. - London : Heinemann, 1965. - xi, 350 p. : ill. ; 24 cm. Includes bibliography & index. LCCN: 63002174 Subjects--Topical Terms: Calculus of variations.Calculus. LC Class. No.: QA315 / .P18 Dewey Class. No.: 517.4 / PAR