Question:
Which employer did Thomas Gerald Room work for in Jun, 1972?

Context:
 Thomas Gerald Room works for University of Cambridge from Jan, 1927 to Jan, 1935. 
 Thomas Gerald Room works for The Open University from Jan, 1971 to Jan, 1974. 
 Thomas Gerald Room works for University of Liverpool from Jan, 1925 to Jan, 1927. 
 Thomas Gerald Room works for University of Sydney from Jan, 1935 to Jan, 1968.

Answer:
The Open University