TY - BOOK AU - Choi, Bo-Ram. TI - Relationship between exposure to and usage of target language and proficiency level AV - PHS P 53.1 .C545 2007 PY - 2007/// CY - Las Piñas City, Philippines PB - Southville International School and Colleges KW - Language proficiency KW - Evaluation KW - Language and languages KW - Study and teaching KW - Language acquisition N1 - Includes bibliographical references ER -