Richard D. Abraham

• Cortina's conversational Japanese
• 2500 Palabras Mas Usadas En Ingles - Metodo Cortina
• Conversational Japanese
• Conversational modern Greek in 20 lessons
• Vest Pocket Arabic (Vest Pocket Series)
• Vest Pocket Italian
• Vest Pocket Modern Greek
• Vest Pocket Vietnamese (Vest Pocket)
• Cortina's conversational Japanese
• Japanese conversaphone
• Japanese for military and civilian use