errata/update:
    Fourth Test of General Relativity: Preliminary Results
    10.1103/physrevlett.20.1265
    10.1103/physrevlett.21.266.3 

    same title; later is errata to the first.
    very minor: The term "baud length" was consistently misprinted as "band length."

DOIs for individual images
    https://commons.wikimedia.org/wiki/Category:Media_from_Williams_et_al._2010_-_10.1371/journal.pone.0010676

long-tail journal not in fatcat; web-native, tricky to crawl
    https://angryoldmanmagazine.com/

dataset
    "ISSN-Matching of Gold OA Journals (ISSN-GOLD-OA) 2.0"
    https://pub.uni-bielefeld.de/data/2913654
    2 files
    has DOI: 10.4119/unibi/2913654

release group; single PDF is valid copy of two DOIs:
    https://fatcat.wiki/file/wr64e37yvfcidgbowtslx7omne
    10.5167/uzh-146424
    10.1016/j.physletb.2017.12.006
    ALSO: has CC-BY license_slug

bad MAG match:

    https://fatcat.wiki/release/b65rjfixxbh4zjd3zxcjdz2b6e
    https://academic.microsoft.com/paper/2535407850
    MAG has wrong metadata? have not corrected in fatcat


## Long-Tail Content

humanities journal; content in SIM and Proquest, no Keepers, no DOIs:

    Clio: A Journal of Literature, History, and the Philosophy of History
    https://fatcat.wiki/container/bsn7fpeyx5ep7eyjgxxd5oygsa

### Examples from Twitter

Thread from 2021: <https://twitter.com/internetarchive/status/1361329860254130181>

- Granta Magazine
- Punk Planet (in IA?)
- Black Clock (https://en.wikipedia.org/wiki/Black_Clock)
- Le Grand Jeu
- ILK Journal (in wayback: http://web.archive.org/web/20160331182524/http://ilkjournal.com/journal/issue-fourteen/roberto-montes/)


### Vanished Content

"Abril"
https://fatcat.wiki/container/stdnbbwbpzflzhp2syctupqtc4
    in DOAJ
    broken DOIs, but new website does exist?