ばいちょ(売価調査)、価格比較とネットでのお買い物を楽に

内容説明 This book is intended both as a comprehensive review and discussion of the major studies of language development and functioning in mentally retarded (MR) persons over the last fifty years， and as an exploration of a number of important issues in this field. *The use of the term ’mental retardation’ is in line with the recommendations of the American Association on Mental Retardation and other relevant organisations.