000 00306nam a2200121Ia 4500
008 160710s1947 xx 000 0 und d
082 _a621.3 STE
100 _aSTEVENSON,J.
245 _aELECTRICITY FOR COAL-MINING STUDENTS
260 _bTHE TECHNICAL PRESS LTD.
_c1947
300 _a243
942 _2ddc
_cB
999 _c10411
_d10411