Sole distributors for the U.S.A. and Canada: 



Elsevier Book Company, Inc., 250 Fifth Avenue, New York i 



For the British Commonwealth except Canada: 



Cleaver-Hume Press, Ltd, 42a South Audley Street, London. W. i 



Printed in The Netherlands by 

 Meijer's Boek- en Handelsdrukkerij, Wormerveer 



