000 00267nam a2200109Ia 4500
008 220204s9999 xx 000 0 und d
082 _a678:534
_bPER
100 _aI
245 0 _aAcoustic methods of investigating polymers
260 _aMoscow
_bMir
_c1975
942 _cBK
999 _c24160
_d24160