Chapman, W.A.J.   <br/><br/>
Senior Workshop Cslculations. 

 - 3rd, Ed. 
 - London :  ELBS Book Society,  1972. 
 - 244 p. 
<br/><br/><label>ISBN: </label>0713132957 
<br/><br/><label>Dewey Class. No.: </label>620  / CHA