Helen Matusevich Oujesky
... that Helen Matusevich Oujesky pursued environmental research on pollution of soil and water, particularly of toxic wastes?
... that <b id="mwCkM"><a href="./Helen_Matusevich_Oujesky" id="mwCkQ" rel="mw:WikiLink" title="Helen Matusevich Oujesky">Helen Matusevich Oujesky</a></b> pursued environmental research on pollution of soil and water, particularly of <a href="./Toxic_waste" id="mwCkU" rel="mw:WikiLink" title="Toxic waste">toxic wastes</a>?