[Public works.]

[Civil defense, Public Works.]

[Public Works Emergency Division exhibit.]

[Exhibit for the Public Works Emergency Division.]

[Public works.]

[Public Works Emergency Division Incident Report.]

[Civil defense, Public Works.]

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

[Department of Public Works.]

[Civil defense, medical unit.]

[Message room.]

[Civil defense.]

[Civil Defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense officer, possibly leading a drill.]

[Civil defense.]

[Civil defense.]

[Woman working on map.]