[walterbell]

Thanks for the pointer, found some online references and eBay has a few physical copies in Russian and English.

14-day online loan, https://archive.org/details/greatsovietencyc0027unse

180 sample pages, https://greatsovietencyclopedia.fandom.com/wiki/Special:AllP...

Sketchy download link for thefreedictionary content, allegedly including GSE, in MDX format for mdict reader apps.

$4 iOS/Android apps for TheFreeDictionary Pro claims offline dictionaries, but doesn't mention GSE.