About turn 

 - Cambridge:  Cambridge Univeristy Press,  1993 
 - 8 p. : ill 
<br/><br/><label>ISBN: </label>9780521436694 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Maths
<br/><br/><label>Dewey Class. No.: </label>510 CAM