Personal Communication with E. Johnston, British Leyland Motor Corporation, Standard Triumph Division, Coventry , U.K.
2.
"Accuracy and Precision of Several Portable Gas Detectors", U.S. Bureau of Mines Report of Investigations 8010, by H. B. Carroll, Jr., and F. E. Armstrong, U.S. Dept. of the Interior.
3.
D.M. Davies (1975) "Closed Environment Problems in Nuclear Submarines". Annals of Occupational Hygiene, 17, 239.
