TY - RPRT TI - Circular of the Bureau of Standards no. 512: methods of measuring humidity and testing hygrometers AU - Wexler, Arnold AU - Brombacher, W G PY - 1951 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS CIRC 512 DO - 10.6028/NBS.CIRC.512 ER -