TY - RPRT TI - Gas generation systems for the evaluation of gas detecting devices AU - Hughes, E E AU - Dorko, W D AU - Scheide, E P AU - Hall, L C AU - Taylor, J K PY - 1973 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 73-292 DO - 10.6028/NBS.IR.73-292 ER -