https://jwijffels.r-universe.dev/ETLUtilshttps://jwijffels.r-universe.dev/api/packages/ETLUtilshttps://jwijffels.r-universe.dev/ETLUtils/ETLUtils.pdfhttps://jwijffels.r-universe.dev/ETLUtils/doc/manual.htmlhttps://jwijffels.r-universe.dev/ETLUtils/NEWShttps://jwijffels.r-universe.dev/ETLUtils/NEWS.txthttps://jwijffels.r-universe.dev/ETLUtils/citationhttps://jwijffels.r-universe.dev/ETLUtils/citation.txthttps://jwijffels.r-universe.dev/ETLUtils/citation.cff