Thomson, A.J. <br/><br/>
A practical English grammar exercises 8 : present, past and past perfect tenses 

 - London :  Oxford Univ. Press,  1972 
 - 47 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ENGLISH LANGUAGE--TEXTBOOKS FOR FOREIGN SPEAKERS<br/>ENGLISH LANGUAGE--GRAMMAR--PROBLEMS, EXERCISES, ETC.
<br/><br/><label>LC Class. No.: </label>PE1128  / T465P