000 00445nam a2200169 4500
008 160616s1970 000 0
245 _aMathematical problems in wave propagation theory
100 _aBabich, V. M., Ed.
260 _aNew York
260 _bConsultants Bureau
260 _c1970
300 _a107
440 _aSeminars in mathematics ; volume 9
500 _aBobc3:2 L0.1 L0.3
942 _cBK
_2BK2379
080 _a53:51 MAT
999 _c2379
_d2379