Eckersley, C.E. <br/><br/>
Essential English For Foreign Students / 
C.E. Eckersley. 
 - Revised ed. 
 - Sofia :  Foreign Languages Press,  1967. 
 - v. :  ill. ;  22 cm. 
<br/><br/>Includes bibliographical references and notes 
<br/><br/> Book 1 (1967, 248 p.)  Book 2 (1967, 247 p.)  Book 3 (1992, 310 p.)  Book 4 (1992, 312 p.) 
<br/><br/><label>ISBN: </label>5-8079-0532-6 (Book 1) 5-8079-0533-4 (Book 2) 5-8079-0534-2 (Book 3) 5-8079-0535-0 (Book 4) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Study and teaching<br/>English language--Textbooks for foreign speakers