Ong, Marcia Fisk <br/><br/>
Touchstone :  video resource book / 
Marcia Fisk Ong ; series author, Michael Mccarthy, Jeanne McCarten, Helen Sandiford 
 - Cambridge :  Cambridge University Press,  2008 
 - 4 v. :  ill. ;  28 cm. 
<br/><br/>Vol. 1. volume 1 -- vol. 2. volume 2 -- vol. 3. volume 3 
<br/><br/><label>ISBN: </label>9780521711999 (v.1) 9780521712002 (v.2) 9780521712019 (v.3) 9780521712026 (v.4) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--United States<br/>English language--Textbooks for foreign speakers<br/>English language--Problems, exercises, etc