TY  - RPRT
TI  - Circular of the Bureau of Standards no. 420: propane, butane, and related fuels
AU  - Weaver, E R
PY  - 1938
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 420
DO  - 10.6028/NBS.CIRC.420
ER  -