Lado, Robert,  1915- <br/><br/>
Language teaching  a scientific approach 
Robert Lado 
 - Bombay  Tata McGraw-Hill  1964 
 - 239 p. : ill. ; 23 cm. 
<br/><br/> Includes indexes 
<br/><br/>p. 223-229 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language and languages--Study and teaching