The Everly Brothers bad ass cover of Little Richard's 'Keep A Knockin' first appears on their very first self-titled album. You don't have that listed as an Everlys album it appears on!
I've got good news and bad news.
The good news is that we show it listed on this page:
https://www.allmusic.com/song/keep-a-knockin-mt0043635537
The bad news is that we have nine different performance pages for this song, each with slightly different spelling, different composers or no composer at all.
https://www.allmusic.com/search/songs/keep+a+knockin%27+the+everly+brothers
This post may have more info on why this can happen: https://allmedianetwork.helprace.com/i2266-why-multiple-pages-for-the-same-song
Thanks for the detailed response. My search results only showed it appearing on the following Everlys compilations, and not on original album releases. Thanks for the clarification.
Regards. 
