https://dsjohnson.r-universe.dev/crawlUtilshttps://dsjohnson.r-universe.dev/api/packages/crawlUtilshttps://dsjohnson.r-universe.dev/crawlUtils/crawlUtils.pdfhttps://dsjohnson.r-universe.dev/crawlUtils/doc/manual.htmlhttps://dsjohnson.r-universe.dev/crawlUtils/citationhttps://dsjohnson.r-universe.dev/crawlUtils/citation.txthttps://dsjohnson.r-universe.dev/crawlUtils/citation.cff