1. Generation of standard gaseous mixtures
2. S.S. Casada, R.L. Wagstaff and R.B. Rhodes, 4th Int. Conf. Sens. Environ. Pollut., ACS, Washington, DC, 1978, p. 121.
3. K. Maguire, G. Bean and R.B. Denyszyn, presented at the 41st Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, New York, March 7, 1990.
4. Low level calibration mixtures for gaseous pollutants