Aleksander Korzhenkov ; English translation and notes by Ian M. Richmond ; edited by Humphrey TonkinMondial in cooperation with Universal Esperanto Associationc2010
Pierre Janton ; edited by Humphrey Tonkin ; translated by Humphrey Tonkin, Jane Edwards, and Karen Johnson-WeinerState University of New York Pressc1993
sponsored by the Center for Research and Documentation on World Language Problems and the Translation Division of the United States ; edited by Humphrey TonkinThe Center1988