000 00238nam a2200097Ia 4500
008 230508s2018 xx 000 0 und d
041 _aeng
100 _aVAIDYA M R
245 _aCONSTRUCTION MATERIALS
260 _bGIGATECH PUB.
_c2018
_g2018
999 _c314009
_d314009