Sidney C. Wolff
... that astronomer Sidney C. Wolff was the first woman to direct a major observatory in the United States?
... that astronomer <b id="mwApk"><a href="./Sidney_C._Wolff" id="mwApo" rel="mw:WikiLink" title="Sidney C. Wolff">Sidney C. Wolff</a></b> was the first woman to direct a major observatory in the United States?