Explains what war gas is, how it is used by the enemy, and how simple household items, such as bicarbonate of soda and bleaching solution, may be used to prevent casualties. (archive.org)
1939
1942
1940
1947
1953
1948
2009
1928
1931
2006
2010
1972
1930
1966
1969
1952
1950
2013
1963
1958