In the emails that were exchanged between the two, Adam Back admits he didn’t read the paper Satoshi sent through. That’s what i was referring to. When satoshi responds back, he literally quotes Hal finney’s description of bitcoin’s innovation, because Hal actually did read the white paper and contributed more than just a few passing references to existing cryptography papers.
Discussion
By “more” I mean in discussions on the mailing list and by running bitcoin early on etc.
Adam’s hash cash was certainly a major contribution(as you mentioned it’s cited and was the point of satoshi’s initial email) but it seems from these emails Adam kinda glossed over satoshi for a number of years early on. 
