[Civil defense.]

[Civil defense.]

[Civil defense officers surrounding a ladder.]

[Civil defense.]

[Civil defense.]

Official Civilian Defense Insignia

[Civil defense.]

[Civil Defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense officers cleaning a spill.]

[Eleven views of empty civil defense offices.]

[Eleven views of empty civil defense offices.]

[Eleven views of empty civil defense offices.]

[Civil defense officer, possibly leading a drill.]

[Civil defense.]

The City of New York Citizens Defense Corps Manual for Public Works Officers