TY  - BOOK
AU  - Sansone G
AU  -  Conti R
TI  - Non-linear differential equations. Rev Ed. tr by A
T2  - International Series of Monographs in Pure and Applied Mathematics ed by I N Sneddon, etc.,67
U1  - B33, K4 
PY  - 1964///
KW  - Equations
ER  -