000 00367nam a2200145Ia 4500
020 _a0000000000
082 _b2312B
_a530.030
100 _a"Suman s. roy, Tanoy Choudhury (Illustrators)"
245 0 _aPhysics - Waves and Sound
260 _b,Pegasus
_aIndia
_c1996
300 _a31
944 _cR
999 _c368578
_d368578