revision preference src: Later Gelpke would move to Iran, where he taught at the University of Tehran and then later at the University of Bern in Switzerland. Moreover he served as an associate professor at UCLA for a year between September 1962 and May 1963. <SEP> tgt: Later Gelpke would move to Iran, where he taught at the University of Tehran and then later at the University of Bern in Switzerland. Gelpke served as an associate professor at UCLA for a year between September 1962 and May 1963.