Bart Bok
... that Bart Bok and his wife Priscilla, who were both astronomers, worked together so closely that it was "difficult and pointless to separate his achievements from hers"?
... that <b id="mwBuQ"><a href="./Bart_Bok" id="mwBuU" rel="mw:WikiLink" title="Bart Bok">Bart Bok</a></b> and his wife <a href="./Priscilla_Fairfield_Bok" id="mwBuY" rel="mw:WikiLink" title="Priscilla Fairfield Bok">Priscilla</a>, who were both astronomers, worked together so closely that it was "difficult and pointless to separate his achievements from hers"?