TY  - RPRT
TI  - Circular of the Bureau of Standards no. 301: United States government master specification for ink, drawing, colored waterproof
PY  - 1926
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 301
DO  - 10.6028/NBS.CIRC.301
ER  -