TY - GEN AU - Hockman, Arthur C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1953-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.LCIRC.1010 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1953 TI - Letter Circular 1010::physical properties of currently produced marbles ER -