In addition to what is mentioned already, someone has recently pointed this out to me, so I can't in all honesty take the credit for noticing...
53 seconds into The Shadows 'Return of the Alamo' is the same 5 steps down as Abba's 'Does Your Mother Know' - first heard at 26 seconds in the line 'can't take a chance on a chick like you'...
Listening to it, it is certainly true. As far as I recall, the ABBA song was released around 1978-1979, so definitely after Return to the Alamo. I can't say I noticed it at the time, but if I did, it had been completely forgotten until today! Have a listen and see what you think...
The Shadows:
https://www.youtube.com/watch?time_cont ... xR_vfH9wUwABBA:
https://www.youtube.com/watch?time_cont ... kL7Fkigfn8