TY - RPRT TI - National voluntary laboratory accreditation program proficiency testing for thermal insulation materials laboratory accreditation program : round 9 - August 1983 AU - Horlick, Jeffrey PY - 1984 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 84-2890 DO - 10.6028/NBS.IR.84-2890 ER -