21st Army Group Organization & Markings by Malcolm A. Bellis. Published by Malcolm A. Bellis, 1992. Datafile 9. This volume takes a more detailed look at vehicle markings and the War Establishment and organization of many of the units which comprised the 21st Army Group. Particular emphasis has been placed on the vehicles and weapons employed. The book is in very good condition with minor wear to the front and back cover edges. Small dents can be found at the top and bottom edges. The binding is slightly coming loose at the bottom but is still intact and holding the pages together. There are no markings on any pages. The back cover has green and blue markings on it.