TY  - RPRT
TI  - Letter Circular 156: contributions to technical literature on cement, concrete, reinforced concrete, stucco, magnesite, building stone and related subjects
PY  - 1925
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 156
DO  - 10.6028/NBS.LCIRC.156
ER  -