000 00297nam a2200121Ia 4500
999 _c20800
_d20800
020 _a0835942910
100 _aAlbert G Spencer
245 _aMaterials for Construction
260 _c1982
_bRESTON PUBLISHING
_aVirginia
300 _ax+438
700 _aGerald A Powell
_eDonald Hudson
942 _cREF