Higgins, J.J. <br/><br/>
Indirect statements, part - 1: Unit 27 

 - Longman Group Limited, London  1974 
 - 10,pp 
<br/><br/><label>ISBN: </label>0 582 53918 8 
<br/><br/><label>Dewey Class. No.: </label>428.24 Hig/Hig