Study and teaching -- Audio-visual aids 13 Self-instruction -- 12 English language -- 5 Sound recordings 5 Sound recordings for English speakers 4 Chinese language -- 3 more ... Audio visual aids 2 German language -- 2 Spanish language -- 2 Arabian language -- 1 Arabic language -- 1 Conversation and phrase books -- 1 English 1 Foreign speakers 1 French -- 1 French language -- 1 Grammar -- 1 Grammar and usage 1 Self-instruction 1 Spoken Thai 1 Textbooks for foreign speakers 1 Thai language -- 1 less ...