https://oobianom.r-universe.dev/r2countryhttps://oobianom.r-universe.dev/api/packages/r2countryhttps://oobianom.r-universe.dev/r2country/r2country.pdfhttps://oobianom.r-universe.dev/r2country/doc/manual.htmlhttps://oobianom.r-universe.dev/r2country/NEWShttps://oobianom.r-universe.dev/r2country/NEWS.txthttps://oobianom.r-universe.dev/r2country/citationhttps://oobianom.r-universe.dev/r2country/citation.txthttps://oobianom.r-universe.dev/r2country/citation.cffhttps://oobianom.r-universe.dev/r2country/doc/r2country_r_introduction.Rmdhttps://oobianom.r-universe.dev/articles/r2country/r2country_r_introduction.html