00345nam a2200157Ia 4500008004100000020000900041035000900050082001600059100001800075245002500093250000800118260003700126300000900163500000900172650000600181210723s9999||||xx |||||||||||||| ||und||  aNULL  a6859  a530.15BRAJ  aRajput, B. S. 0aMathematical Physics  a7th  aMeerutbPragati Books Pvt . Ltd.  a1385  a1682  a-