TY - BOOK AU - Oxenden,Clive TI - American English File 4 SN - 9780194774659 AV - PE2807 .O943 2013 U1 - 427.973 23 PY - 2009///. CY - Oxford PB - Oxford Univ Press KW - English language KW - Study and teaching KW - United States KW - Problems, exercises, etc KW - Sound recordings in foreign speakers ER -