Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ronald Greeley,Lava tubes and channels in the lunar Marius Hills,The Moon,0027-0903,Springer Science and Business Media LLC,1971-12,3,3,289-314,https://cir.nii.ac.jp/crid/1361418521177753472,https://doi.org/10.1007/bf00561842