OPEN University of Sri Lanka <br/><br/>
Bachelor of science degree programme , MAU 112-mathematics-unit 1 

 - Nugegoda  The Open University of Sri Lanka  1978 
 - 151 p. 
<br/><br/><label>ISBN: </label>139549 
<br/><br/><label>Dewey Class. No.: </label>515.35  / OPE