https://msperlin.r-universe.dev/GetFREDatahttps://msperlin.r-universe.dev/api/packages/GetFREDatahttps://msperlin.r-universe.dev/GetFREData/GetFREData.pdfhttps://msperlin.r-universe.dev/GetFREData/doc/manual.htmlhttps://msperlin.r-universe.dev/GetFREData/NEWShttps://msperlin.r-universe.dev/GetFREData/NEWS.txthttps://msperlin.r-universe.dev/GetFREData/citationhttps://msperlin.r-universe.dev/GetFREData/citation.txthttps://msperlin.r-universe.dev/GetFREData/citation.cffhttps://msperlin.r-universe.dev/GetFREData/doc/GetFREData-vignette-introduction.Rmdhttps://msperlin.r-universe.dev/articles/GetFREData/GetFREData-vignette-introduction.html