/l/ Ranges are averages of ranges of values reported in the literature cited. They may be con- 

 sidered to be equivalent to estimate "d" of the 951^ range (cf. Introduction). /2/ See also 

 table on excretion of nitrogen campovinds. /5/ Chloride, /h/ Fluoride. /5/ Data Include regions 

 in Texas where dental fluorosis Is endemic. /6/ Iodide. /7/ For ages 8-12 yr. 



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