The men's 400 metres event at the 1991 Summer Universiade was held at the Don Valley Stadium in Sheffield on 21 and 22 July 1991.
References
Athletics at the 1991 Summer Universiade – Men's 400 metres Wikipedia(Text) CC BY-SA
The men's 400 metres event at the 1991 Summer Universiade was held at the Don Valley Stadium in Sheffield on 21 and 22 July 1991.