TY - RPRT TI - A study of vacuum gages for use in evacuating refrigerating systems AU - Phillips, Carl W AU - Cole, S D AU - Achenbach, Paul R PY - 1965 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS report ; 8640 DO - 10.6028/NBS.RPT.8640 ER -