The Full-Text Links Control File provides a link between the magazines indexed in one of the indexes and any identified online sources that contain the full-text of the associated issue (such as The Pulp Magazines Project or HathiTrust. Each record contains three fields:
Examples:
adventure_191102~1911ADVFeb~http://www.pulpmags.org/flb/adv191102/index.html
1836*Lvs&Exp~1836*Lvs&Exp~http://hdl.handle.net/2027/nyp.33433075959563
harpers_new_monthly_000~HpNMM~http://ebooks.library.cornell.edu/h/harp/index.html