Presumably your "source" comes from the same place as most of your other buffoonery, your rear end.
those two novels (in the GERMAN language edition. i do NOT own, nor have i read, the US editions)are the only two books of fiction that i can remember reading that have BOTH a bibliography of sources AND copious footnotes. (my hunch is that Dr Thorwald wrote those books from his PhD dissertation.)
your documentation of your claims, otoh, is LACKING or ABSENT in virtually every case. my guess is that you HOPE that by attacking everyone else (who disagrees with your FALSE posts), will cause your readers to miss that you have FEW or NO facts "on your side".
free dixie,sw