TY  - BOOK
AU  - Sneddon, Ian N.
TI  - Elements of partial differential equations
T2  - International series in pure and applied mathematics
SN  - 0070857407
U1  - 515.353 
PY  - 1957///
CY  - Tokyo
PB  - McGraw-Hill 
KW  - Wave Equations
KW  - Differential Equations Elements of partial differential
ER  -