THE EXPERIMENTAL AND EARLY MACHINE POSTMARKS OF GERMANY, Jerry H Miller, 2008 (hardback)
From Hinrichsen to Krag (1866-1906) - the definitive work - updated 2008 edition
This is the revised and updated 2008 edition of Miller's definitive 1993 work, in neat hardback with dustjacket. English and German text, with over 200 colour illustrations. 142pp.