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https://explore.chicagocollections.org/records/?f4-institutions=Chicago+History+Museum&sort=title&f6-institutions=Chicago+History+Museum&f3-institutions=Chicago+History+Museum&f1-names=Washington%2C+Harold%2C+1922-1987&f5-types=Archival+Collections&f2-topics=Natural%20%26%20Built%20Environments::City%20Planning