00398nam a2200145Ia 4500 9781466581456 515.354 POL/H Polyanin, A.D Handbook of linear partial differential equations for engineers and scientists Crc Press London 2016 1607p Engineers And Science Nazaikinskii, E Vladimir BK 6136 6136 0 0 0 0 MAT GBCTL GBCTL R15 2024-01-06 515.34 POL/H 65561 REF