TY - RPRT TI - Circular of the Bureau of Standards no. 323: United States government master specification for cement, plastic magnesia (magnolia-oxychloride) used as flooring, bases, wainscots, etc. PY - 1927 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS CIRC 323 DO - 10.6028/NBS.CIRC.323 ER -