Chicago Marathon 1977: verschil tussen versies

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*{{en}}[http://www.arrs.net/MaraRank/ATM_Mara1977.htm World Marathon Rankings for 1977 op www.arrs.net]

*{{en}}[http://www.chicagomarathon.com/CMS400Min/uploadedFiles/Chicago_Marathon/Press_Center/Segment%20002%20of%20Media%20Guide.pdf BANK OF AMERICA CHICAGO MARATHON RESULTS & HISTORY (chicagomarathon.com)]}}