Masters M75 400 metres world record progression (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Masters M75 400 metres world record progression" in English language version.

refsWebsite

Global rank English rank

1mastershistory.org

low place

low place

1books.google.com

3^rd place

3^rd place

books.google.com

Olson, Leonard T. (Nov 29, 2000). Masters Track and Field: A History. McFarland. ISBN 0786408898.

mastershistory.org

http://www.mastershistory.org/International-Results/sweden1977s.pdf ^{[bare URL PDF]}