https://expersso.r-universe.dev/pdftableshttps://expersso.r-universe.dev/api/packages/pdftableshttps://expersso.r-universe.dev/pdftables/pdftables.pdfhttps://expersso.r-universe.dev/pdftables/doc/manual.htmlhttps://expersso.r-universe.dev/pdftables/citationhttps://expersso.r-universe.dev/pdftables/citation.txthttps://expersso.r-universe.dev/pdftables/citation.cffhttps://expersso.r-universe.dev/pdftables/doc/convert_pdf_tables.Rmdhttps://expersso.r-universe.dev/articles/pdftables/convert_pdf_tables.html