TY - RPRT TI - Strength, absorption, and resistance to laboratory freezing and thawing of building bricks produced in the United States AU - McBurney, John W AU - Richmond, Joseph C PY - 1940 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS BMS 60 DO - 10.6028/NBS.BMS.60 ER -