000 00240nam a2200085Ia 4500
008 160710s1957 xx 000 0 und d
245 _aENGINEERING NEWS RECORD VOL. 158 APRIL-JUNE 1957
260 _aNEW YORK
_bMCGRAW HILL
_c1957
942 _2ddc
_cB
999 _c31062
_d31062