Here is an old blogpost, originally from November 13 2009, and published again in June 2019, together with the threads from those earlier versions. I reprint it because of
(1) recent debate about the editiones typicae of the Missale Romanum.
It matters whether there was an editio typica in 1962, and, if so, what its date was. Because on these details hangs the question of whether it is lawful
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