TY  - RPRT
TI  - Circular of the Bureau of Standards no. 386: specifications for the manufacture and installation of railway track scales for light industrial service (for knife-edge scales only)
PY  - 1930
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 386
DO  - 10.6028/NBS.CIRC.386
ER  -