@book{ BA00973701, author = "Ginsburgs, George", title = "The citizenship law of the USSR", publisher = "M. Nijhoff Publishers,Distributors for the U.S. and Canada, Kluwer Boston", year = "1983", series = "Law in Eastern Europe", number = "no. 25", URL = "https://ci.nii.ac.jp/ncid/BA00973701" }