[Civil defense, Public Works.]

[Public works.]

[Public Works.]

[Public Works Emergency Division exhibit.]

[Exhibit for the Public Works Emergency Division.]

[Civil defense.]

[Civil defense.]

[Civil Defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]

[Civil defense.]