00319nam a22001217a 4500082001800000100001500018245003900033250001200072260004500084300002300129526003700152650000800189  a530.2462bdun  aduncan, J.  aA text book of physicscduncan, J.  a2nd ed.  alondonbmacmillan and company ltdcc1955  av, 749bill.c20cm  a0b0c0d530_246200000000000_DUN  amce