https://datastreamapi.r-universe.dev/DatastreamRhttps://datastreamapi.r-universe.dev/api/packages/DatastreamRhttps://datastreamapi.r-universe.dev/DatastreamR/DatastreamR.pdfhttps://datastreamapi.r-universe.dev/DatastreamR/doc/manual.htmlhttps://datastreamapi.r-universe.dev/DatastreamR/citationhttps://datastreamapi.r-universe.dev/DatastreamR/citation.txthttps://datastreamapi.r-universe.dev/DatastreamR/citation.cff