I was taught as an undergraduate to be very careful when using and citing reprints of older books because they were frequently edited, abridged, or even censored. I was specifically warned not to use the "For Kids" editions of Shakespeare that removed all of the sex jokes and that failure to use the "real" versions would be punishable by catapult significant grade reduction if caught.
It occurred to me that I've never heard of censored editions of journals or articles cropping up. Are they a thing in academia at all? I did find a mention of journals choosing to censor themselves for political reasons, but I'm looking for cases where there are both censored and non-censored editions of a journal or article floating around. For example, I can imagine a "China Edition" of a geology journal in which "soil samples from Taiwan" has been edited into "soil samples from the Taiwan province of China" and in which a certain political dissident has been removed from the authors list. Similarly, I can imagine alternate editions of an educational research article in which literacy test scores in Crimea are alternately aggregated into Russian or Ukrainian statistics.
Do examples of censored journal publications exist, where there are both censored and non-censored versions floating around libraries and labs around the world and where knowing which one you have obtained a copy of might be important?
Cases such as the one I linked above, where a journal chooses to only publish a censored version of research everywhere in the world, do not count. Only cases where there are both censored and uncensored versions floating around (probably in different countries) count.
In response to Anonymous Physicist, I am asking specifically whether "censored alternative journals" exist in cases where a government (or university, faculty association, angry armed mob, etc.) would otherwise completely ban academic publications for political reasons. Such "alternative" journals would have omissions, additions, or changes to conform the research to political expectations (e.g. don't mention the human rights abuses happening in X City or don't acknowledge the scientific contributions of Y Persona Non Grata) while trying to preserve as much of the scientific message as possible.