He taught there for 38 years as a full professor.
He taught there as a full professor from 1939 until his retirement in 1965.
He began teaching at Columbia as an assistant professor in 1968.
He began teaching at Purchase as a visiting professor in 1986.
He was licensed to practice law in the state of Georgia and also taught as a professor.
From 1925 to 1940 he taught as a professor in Belgrade.
Between 1943 and 1956 he taught as a professor at the military school of Bolivia.
By 1988, she had returned to Berkeley to teach as a professor of higher education, until her retirement in 1995.
He began teaching as a professor of law at Georgetown University in 1901.
He has also taught as a visiting professor at a number of prominent universities.