geology of the Ellsworth Mountains
... that the geology of the Ellsworth Mountains was explored by geologists using motor toboggans in 1961?
... that the <b id="mwBaA"><a href="./Geology_of_the_Ellsworth_Mountains" id="mwBaE" rel="mw:WikiLink" title="Geology of the Ellsworth Mountains">geology of the Ellsworth Mountains</a></b> was explored by geologists using motor toboggans in 1961?