Hi Phil (Prof Worthog)
I have an electronic copy of the Kendal Journals - could not see this in any KCC journal or newsletter from around that time.
Here's a thought, I have another Morecambe Bay reference - for some caves at Arnside and Silverdale from about that time
The group that published it were called NOLSPEC (no idea what it stands for )
Interestingly the text references this article as NOLSPEC Reports Vol 4 book 20 December 1969
Your notation on the paper says Vol 4 book 4 - could there be a link ?