000 00243nam a2200097Ia 4500
008 170101s2017 xx 000 0 und d
082 _a621.381 51 F40P
100 _aFIELDING, T. G.
245 0 _aPhoto-electric and selenuim cells
942 _2ddc
_cB
999 _c6465
_d6465