000 00305pam a2200145a 44500
040 _cIITK
041 _aeng
082 _a535
_bJ147i
100 _aJacob, L.
245 1 _aAn introduction to electron optics
260 _aLondon
_bMethuen
_c1951
300 _a150p
650 _aOptics
942 _cBK
999 _c388473
_d388473