TY - RPRT TI - Circular of the Bureau of Standards no. 453: apparatus for determining water-vapor permeability of moisture barriers AU - Carson, Frederick T AU - Worthington, Vernon PY - 1946 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS CIRC 453 DO - 10.6028/NBS.CIRC.453 ER -