Passage: Dr. Kolker learned Esperanto in 1957 and is the author of articles on interlinguistics, book reviews and three famous Esperanto textbooks for students of different levels. Due to the great popularity of his book eo:Vojaĝo en Esperanto-lando (Travels in Esperanto-Land), which is both a proficiency course in Esperanto and a guidebook to Esperanto culture, he is known to many as a guide to Esperanto-Land.Kolker is a member of the Academy of Esperanto, an honorary member of the World Esperanto Association (Universala Esperanto Asocio), and an associate editor of the monthly magazine Monato. For two decades he headed a large-scale Esperanto correspondence course in Russia that graduated around 900 students. He also taught Esperanto at American universities in San Francisco and Hartford.

Question: Where did Dr. Kolker teach at?
Russia