15-4- 



le-- 



5-- 



ULIS 

 AUGUST 1985 



N = 36 



812345678 

 MEAN RPD DEPTH (CM) 



10+ 



5-- 



WLIS REF 

 AUGUST 1985 



N = 28 



12 3 4 5 6 7 



MEAN RPD DEPTH (CM) 



Figure 3-9. The frequency distributions of RPD depths for 

 WLIS and VJLIS REF in August, 1985. 



24 



