Question:
Which employer did Harrison B. Tordoff work for in Jul, 1958?

Context:
 Harrison B. Tordoff works for University of Minnesota from Jan, 1970 to Jan, 1991. 
 Harrison B. Tordoff works for University of Michigan from Jan, 1957 to Jan, 1970. 
 Harrison B. Tordoff works for University of Kansas from Jan, 1950 to Jan, 1957.

Answer:
University of Michigan