Bibliografía (7 obras)
Interpersonal dynamics in second language education
1998
Understanding second language learning difficulties
1996
Contemporary Cambodian
1974
Contemporary Cambodian: the land and the economy
1973
Contemporary Cambodian: grammatical sketch
1972
The meanings of the modals in present-day American English (Janua linguarum)
1966
The meanings of the modals in present-day American English
1900
