TY  - RPRT
TI  - Circular of the Bureau of Standards no. 256: United States government master specification for brown denim (shrunk)
PY  - 1925
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 256
DO  - 10.6028/NBS.CIRC.256
ER  -