00281nam a2200109 a 450000500170000008200230001710000060004011000200004624500680006626000220013430000150015620251203090947.0  a530.15525,bD, col  d_  aVladimirov, V.S  aCollection of problems on the equations of mathematical physics  aMoscowbMirc1986  a288p, 22cm