Here are a few original documents. Some have been edited, while others are clearly from pro-communist sources like the New York Times and the Nation. They don’t have links to the original sources which is unfortunate. You will need to look up those sources yourself.
http://historyproject.ucdavis.edu/lessons/view_lesson.php?id=45
Anyone else interested in this show know that Sergeantdave provided a great and very informative link on the subject.