Category:Articles with PDF format bare URLs for citations

This is a tracking category It is used to build and maintain lists of pages—primarily for the sake of the lists themselves and their use in article and category maintenance. They are not part of the encyclopedia's categorization scheme. More information: This category is hidden on its member pages—unless the corresponding user preference is set. These categories are used to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience. These categories also serve to aggregate members of several lists or sub-categories into a larger, more efficient list (discriminated by classifications).

Administrators: Please do not delete this category even if it is empty! This category may be empty occasionally or even most of the time.

This is a tracking category Bare URL references to PDF documents which have been tagged with {{Bare URL PDF}}. These bare URL refs are tracked separately because tools such as Citation bot, Reflinks and reFill cannot extract metadata from PDF documents, so the metadata such as title, author and publication date needs to be added manually.