Search Results for the EPA National Library Catalog

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Your Search: (AUTHOR=Helms AND Ronald AND W)


 
 
 
Select Item Title Year Published
Effects of Etiologically Defined Respiratory Infections on Lung Function and Its Growth in an Area of Low Air Pollution - Spirometry in Young Children When Illness-Free. 1981
The interlaboratory precision test : an eight-laboratory evaluation of the provisional algal assay procedure bottle test / 1971

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