000 00562nam a2200217Ia 4500
003 OSt
005 20220928141615.0
006 a|||||r|||| 00| 0
007 ta
008 220927b |||||||| |||| 00| 0 eng d
024 _a16300
037 _cTextual
040 _aSDCL
_cSDCL
_beng
041 _2eng
_aeng
082 _aB33, N5
100 _aPoluyanov Leonid V
_9501165
245 0 _aGroup properties of the acoustic differential equations.
260 _c1995
942 _hB33, N5
_cTEXL
_2CC
999 _c818654
_d818654