{HEAD ~ Appropriate ranges} can be derived from special data material, and in the case of {TAIL ~ the examples} discussed, values in the range of 5 to 20 are typically obtained 
{ HEAD ~ Appropriate ranges } can be derived from special data material , and in the case of { TAIL ~ the examples } discussed , values in the range of 5 to 20 are typically obtained
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH