NNew English proficiency courseNew English proficiency coursede H. A. Swan, Stanley Thornes, H. A. SwanMateriasEnglish languageText-books for foreign speakersLinguisticsELT: Learning Material & CourseworkLanguage Arts / Linguistics / LiteracyEdiciones (3)New English proficiency course (1984)Hulton · inglésNew English Proficiency Course (1984)