TY - RPRT TI - Circular of the Bureau of Standards no.508: reference tables for thermocouples AU - Shenker, Henry AU - Lauritzen, John I Jr AU - Corruccini, Robert J PY - 1951 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS CIRC 508 DO - 10.6028/NBS.CIRC.508 ER -