solar radio emission
... that solar radio emission was first observed in 1942 during World War II by British radar operators?
... that <b id="mwA64"><a href="./Solar_radio_emission" id="mwA68" rel="mw:WikiLink" title="Solar radio emission">solar radio emission</a></b> was first observed in 1942 during <a href="./World_War_II" id="mwA7A" rel="mw:WikiLink" title="World War II">World War II</a> by British <a href="./Radar" id="mwA7E" rel="mw:WikiLink" title="Radar">radar</a> operators?