Please handle with 



EXTREME CARE 



This volume is brittle 

 and CANNOT be repaired! 



Photocopy only if necessary 

 Return to library staff, do not in bookdrop 



GERSTEIN SCIENCE INFORMATION CENTRE 



Library staff, please retie with black ribbon and reshelve 



HHHI 





""'''>' W.'',' V>'vV' ; S'- : ' ' 



