Boris Kolker (born July 15, 1939) is a language teacher, translator, and advocate of the international language Esperanto. Until 1993 a Soviet and Russian citizen and since then a resident and citizen of the United States. In 1985 he was awarded a Ph.D. in linguistics from the Linguistic Institute of the USSR Academy of Sciences in Moscow. Dr. Kolker learned the language Esperanto in 1957. Wikipedia
The definitive Wikipedia entry for Boris Kolker. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Boris_Kolker