Instructions for the operation and maintenance of disinfectors, portable, field, nos. 1, 2, and 3 : 1941 / by command of the Army Council [at] The War Office.

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Instructions for the operation and maintenance of disinfectors, portable, field, nos. 1, 2, and 3 : 1941 / by command of the Army Council [at] The War Office. Public Domain Mark. Source: Wellcome Collection.