This is a long shot, but I googled "William Roderick Vietnam" and found this:http://www.trinity3.com/f_roderick/will ... erick.html
In the very last line, it says:
"Project Delta, Detachment B-52. Reconnaissance Operations throughout Viet Nam. Areas of operation were 30 to 35 minutes by helicopter from our temporary base camps. This Unit is written about in the book, Ether Zone by R. C. Morris."
Here is that book: http://www.amazon.com/Ether-Zone-Specia ... 1555716628
Could that be it? It says the author "was commissioned by the Project Delta members to write their story."