Charles: Thanks, I think that was part of it. I remember reading something about the 6th Floor Museum receiving the "raw" notes from an editor or reporter for a Dallas paper. I believe it was an editor who gave them the notes he had from the reporters in the field. I would guess that that would be "clean" information free from any influence of the news about the shots, et cetera.
This is from the inside flap of the cover:
“In the summer of 2012, as The News planned its coverage for the 50th anniversary of the assassination, reporter David Flick acquired copies of the notes firm the DeGolyer Library at Southern Methodist University, which houses the original documents.”
The appendix in the back of the book appears to have images of the original notes on the old yellowed paper typewritten pages. They are arranged by the names of each reporter in alphabetical order. The main section of the book contains a chronological assortment of sections of the notes. So far, all the accounts I have read indicate 3-shots heard.