TY  - RPRT
TI  - Letter Circular 230: glycerin or ethylene glycol in foundry sand mold facing mixtures
PY  - 1927
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 230
DO  - 10.6028/NBS.LCIRC.230
ER  -