000 004370000a22001690004500
008 160902b1970 xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a624.012.4
_bPOR
942 _cPM
_2udc
245 _a[concrete information] Removing stains from concrete
260 _bPortland Cement Association
260 _aSkokie
260 _c1970
300 _a6p.
650 _aCONCRETE-Stains-Removal
999 _c22321
_d22321