TY  - RPRT
TI  - Circular of the Bureau of Standards no. 256 e2: United States government master specification for denim, brown (shrunk)
PY  - 1927
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 256e2
DO  - 10.6028/NBS.CIRC.256e2
ER  -