TY  - RPRT
TI  - Letter Circular 1010: physical properties of currently produced marbles
AU  - Hockman, Arthur
PY  - 1953
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 1010
DO  - 10.6028/NBS.LCIRC.1010
ER  -