000 00312nam a2200121Ia 4500
008 160710s1954 xx 000 0 und d
082 _a695.6 CEM
100 _aWITT, P. J. ED.
245 _aCONCRETE SHELL ROOF CONSTRUCTION
260 _bCEMENT AND CONCRETE ASSOCIATION
_c1954
300 _a258
942 _2ddc
_cB
999 _c19603
_d19603