Composed by Herb Ellis, arranged by Bill Holman
(A) Country Boy is from Maynard Ferguson's 1963 Come Blow Your Horn album (Cameo SC-1066).
Probable personnel: Maynard Ferguson, Dusko Gojkovic, Rick Kiefer, Nat Pavone (tp), Don Doame, Kenny Rupp (tb), Lanny Morgan (as), Frank Vicari, Willie Maiden (ts), Ronnie Cuber (bs), Mike Abene (p), Linc Milliman (b), Rufus Jones (d)
The original album is kind of rare, but I found an image of the back cover. If you squint, you can see the soloists include Willie Maiden on tenor, and Maynard on valve trombone!
(For an interesting back story on Maynard's short stint on the Cameo label, check out Marc Meyers' Maynard Ferguson on Cameo.)
A Country Boy was penned by guitarist Herb Ellis, and I think first made its first appearance on the 1959 Herb Ellis Meets Jimmy Giuffre, which is also very much worth a listen: