TY  - RPRT
TI  - Circular of the Bureau of Standards no. 223: United States government master specification for rubber tips for crutches
PY  - 1925
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 223
DO  - 10.6028/NBS.CIRC.223
ER  -