Nearly 25,000 pages of literature on the Orthotylinae and Phylinae are included in the PBI Digital Library. These are viewable as PDF files accessible through the systematic catalog. Files are available either as bound volumes in 75-page groupings, or as single pages. Entries can be accessed at two points:
1. bibliography (reached via "authority pattern" or "title pattern") on the main search page; selecting the book icon will bring up a bound PDF volume.
2. taxon references in the catalog: access at this point allows viewing of either a bound volume or an individual page, depending on the icon selected.