TY  - BOOK
AU  - Friedman,Bernard
TI  - Techniques in solving partial differential equations
PY  - 1950///
CY  - s.f.: 
PB  - s.f., 
KW  - INIST
KW  - PARTIAL DIFFERENTIAL EQUATIONS
KW  - ALGEBRA LINEAL
KW  - FUNCIONES (MATEMÁTICAS)
KW  - ECUACION DE DIRAC
ER  -