Indicia states copyright 1975, but since the US cover is from September 1976 this must be from later.
The Bingo, Samantha & Rebel illustrations are from the "Dunes of Doom" story. The Super Duck illustration is from "The Good Scout" story. The small Jughead & Archie illustration is from the "Dog Daze" story. The small Betty & Veronica illustration is from the "Bully for You" story. Lastly, the "Li'l Jinx" illustration is from "The Grand Sand Play" story. (Note from US publication. Unknown if all these stories are included in this reprint).