00750nam0-22002531i-450-990001133990403321000113399FED01000113399(Aleph)000113399FED0100011339920000920d1950----km-y0itay50------baengExistence theorems in partial differential equationsby BernsteinPrinceton [N.J.]Princeton University Press1950Vol 23esimoBernstein,Dorothy Lewis54443ITUNINARICAUNIMARCBK990001133990403321C-11-(231086MA1MA1Existence theorems in partial differential equations345265UNINAING01