http://newgon77kdbgbo2xqfr7ey7he54zmjeaw3bn6o75fqnoyc3wkktjtgyd.onion/wiki/Help:Research_Resources
Library Genesis A major shadow library that formed part of Z-Lib's database. PDFDrive Sharing service. Web Archive The longest-running such service, it runs off robots and manual submissions, archiving whole web pages. Is unlikely to go offline, but often censors our topic.