TY  - RPRT
TI  - Circular of the Bureau of Standards no. 340: United States government master specification for leather, hydraulic packing (vegetable tanned)
PY  - 1927
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 340
DO  - 10.6028/NBS.CIRC.340
ER  -