I could tell you how I got this but then I'd probably have to kill 'ya to protect the source. Its dated 1977 and is actually very good, pretty much along the lines of what I have always been taught with regards to well economics and when, and how, to pull the trigger on a well or on a behind pipe plug back., what acceptable ROI's are, how to to risk exploration, etc. etc.
I can tell you that not ONE thing Exxon now appears to be doing in the Permian Basin in the Wolfcamp and Bone Springs, etc. is remotely related to the economic guidelines set forth in this seminar package from 1977. Not even stinkin' close.