TY  - RPRT
TI  - Technology of liquid helium 
AU  - Kropschot, R H
AU  - Birmingham, B W
AU  - Mann, D B
PY  - 1968
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS MONO 111
DO  - 10.6028/NBS.MONO.111
ER  -