If you know of a variation that isn't here, or have a correction, please let me know. The following printed sources proved more useful than most. I disagree with some of the variations they report, after using the books as listening guides. Note that some of the variations in our present list are in none of these items. I'd like to thank especially the Rodgers and Hammerstein Archives of Recorded Sound, part of the New York Public Library's Music Division, for collecting some of these and other items that I consulted.
Every fan needs a copy.
I cannot praise Mark's research and reporting skills enough. Even where his interpretations might be wrong, his facts can be relied upon. This is as close as we get to a primary source, based on his listening to the tapes and examining studio documentation. I've stolen a lot from this book, and yet it's just a fraction of what's in it. This well researched book finally documents the non-EMI Beatles recordings in Lewisohn style, with reproductions of paperwork and interviews with those present, and also details their complicated release history.