TY  - BOOK
AU  - Laballe,Joseph P.
AU  - Solomon Lefschetz
TI  - International symposium on nonlinear differential equations and nonlinear mechanics
AV  - MATH QA427.I5 
PY  - 1963///
CY  - New York
PB  - Academic Press
KW  - Nonlinear theories
N1  - Includes bibliographical references
ER  -