Partial differential equations
Petrovskii, I. G.
Partial differential equations I. G. Petrovskii - Philadelphia W. B. Saunders 1967. - 410 pages : illastration ; 21 cm. - Saunders mathematics books .
Differential equations, Partial
Partial differential equations I. G. Petrovskii - Philadelphia W. B. Saunders 1967. - 410 pages : illastration ; 21 cm. - Saunders mathematics books .
Differential equations, Partial
