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City Auditor - Archives & Records Management - City Collections - Civil Defense (Archival) - Civil Defense Records - Civil Defense Subject Files - Attack Warning System : Portland Map showing location of sirens |
M/1638 |
12/31/1952 at 9:14:02 AM |
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City Auditor - Archives & Records Management - City Collections - Civil Defense (Archival) - Civil Defense Records - Civil Defense Subject Files - Attack Warning System : Portland Map showing location of the sirens and there previously planned location |
M/1639 |
12/31/1952 |
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City Auditor - Archives & Records Management - City Collections - Civil Defense (Archival) - Civil Defense Records - Civil Defense Subject Files - Attack Warning System : Portland Map tentative location for sirens |
M/1637 |
12/31/1952 |
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City Auditor - Archives & Records Management - City Collections - Civil Defense (Archival) - Civil Defense Records - Civil Defense Subject Files - Blueprint Plan : Air raid siren platform, American Bank Building |
M/1640 |
07/10/1953 |
