https://www.armchairdragoons.com/articles/another-bulge-game-a-retrogrognard-look-at-hitlers-last-gamble-the-battle-of-the-bulge-by-david-c-isby-and-rand-game-associates-1975/
Another Bulge Game? A RetroGrognard Look at Hitler’s Last Gamble: The Battle of the Bulge by David C. Isby and Rand Game Associates (1975)