ZineWiki is an open-source encyclopedia devoted to zines and independent media. It covers the history, production, distribution and culture of the small press. You can find information here on specific zines - titles, authors, how long they ran, etc.
This is a great resource for subject terms not well covered by the Library of Congress Subject Headings. The subject terms in the Zine Thesaurus were selected by volunteer cataloguers at the Anchor Archive and compiled into a thesaurus by Amanda Stevens. You can send in your suggestions / proposed edits.
The subtitle of the book containing this chapter being Library and Information Skills in Social Justice Movements and Beyond, this essay is about informing and empowering library workers with subject expertise in zines (or another special collections area) to do their own cataloging.
(From the website):
For the same reasons readers, scholars, and information professionals benefit from resources like WorldCat and DPLA (Digital Public Library of America), people concerned with zines would be well-served by a union catalog for zines. ZineCat will aid academic and independent readers who want to find information about individual zines, as well as about the breadth of zine resources available on particular topics.
Zine Librarians Code of Ethics
The Zine Librarians Code of Ethics zine, a collaborative document that incorporates input from dozens of zine librarians in various settings, provides some useful considerations around collection building, access, and cataloging among other topics.