000 00254nam a22000857a 4500
008 210312b ||||| |||| 00| 0 eng d
050 _aTK872.S4
245 _aProgress in semiconductors
_cGIBSON, ALAN F.
942 _2lcc
_hTK872.S4 .G53 1957
999 _c2324
_d2324