00282nam a2200121Ia 450000500170000000800410001704100080005808200130006610000140007924500380009326000200013130000090015120260720174718.0260720s1976    xx            000 0 und d  aeng  a530 SINN  aSingh S B  aNew approach to practical physics  aNew Delhic1976  a174p