TY  - RPRT
TI  - Letter Circular 860: standards and specifications for building and construction materials, fixtures, supplies, and equipment (superseding Letter Circular 808)
PY  - 1947
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - LCIRC 860r1947
DO  - 10.6028/NBS.LCIRC.860r1947
ER  -