00321nam a2200121Ia 4500008004100000040003800041100001500079245003500094250000800129260003500137300001500172653001200187211214s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aAllen, H S 0aText-book of practical physics  a003  bMACMIILAN AND COaLONDONc1952  aXV,581P p.  aPHYSICS