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An economic study of Portland's Exposition - Recreation Center | AF/20280 | 12/31/1955 | ||
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Correspondence and memos | AF/20279 | 12/31/1957 | ||
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Progress reports and general information | AF/20278 | 12/31/1957 | ||
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Newspaper clippings | AF/20277 | 12/31/1957 | ||
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Related publications | AF/20276 | 12/31/1956 |