57 



U > ^ 



<D X) -H CO 

 +J Q) !>>-P 3 



t^to ON Ovo CO r- 



o o to 



rv?lcN?l 



O O OvO o o o 



Lf^ UMJ-\ O O rH iH 

 CV C\i C\i ON On to CO 



O CNJ O 

 O CO o 



CM -d-o i>-nd toco 



r^CV CV H rH H iH 



