This article examines the materiality, construction, and circulation strategies of LGBTQ information interfaces within a longer genealogy of media practices that troubles the Internet’s predominance in understandings of queer self-formation. It focuses on a particular bibliographic project: A Gay Bibliography (1971–80), produced by Barbara Gittings, an activist who was the coordinator of the American Library Association’s Task Force on Gay Liberation. The article examines the role of bibliographies in the gay liberation movement’s broader information activism and develops a longer history of “queer bibliographic encounters” that connects these older practices on paper to theorizations of queer youth and online media in the present. Methodologically, the article analyzes a collection of several hundred letters sent to Gittings to request the bibliography, in order to examine the affective economies of information interfaces in LGBTQ contexts. The article argues that the prevalence of bibliographic encounters across “old” and “new” media provides a model for understanding how information interfaces construct the subjects and stakes of social movements across time, and for imagining new forms of knowledge mobilization open to the persistent unbelongings of social movement participation.