2024-03-28T19:19:29Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/559872019-03-18T10:23:55Zhdl_2115_55867hdl_2115_45005hdl_2115_116A NOTE ON COVERING SPACES1)Kurata, Y.Kato, M.open access410北海道大学Hokkaido University1956engdepartmental bulletin paperVoRhttp://hdl.handle.net/2115/559872189-3187Journal of the Faculty of Science Hokkaido University. Ser. 1 Mathematics北海道大学理学部紀要132065067https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/55987/1/JFSHIU_13_N2_065-067.pdfapplication/pdf261.34 KB1956