J. E. Kaufmann, H. W. Kaufmann

The Forts & Fortifications of Europe 1815-1945: The Central States: Germany, Austria-Hungry and Czechoslovakia - J. E. Kaufmann, H. W. Kaufmann

The Forts & Fortifications of Europe 1815-1945: The Central States: Germany, Austria-Hungry and Czechoslovakia

Castle to Fortress: Medieval to Post-Modern Fortifications in the Lands of the Former Roman Empire - J. E. Kaufmann, H. W. Kaufmann

Castle to Fortress: Medieval to Post-Modern Fortifications in the Lands of the Former Roman Empire

The Forts & Fortifications of Europe 1815- 1945: The Neutral States (The Netherlands, Belgium and Switzerland): The Netherlands, Belgium and Switzerland - J. E. Kaufmann, H. W. Kaufmann

The Forts & Fortifications of Europe 1815- 1945: The Neutral States (The Netherlands, Belgium and Switzerland): The Netherlands, Belgium and Switzerland

Castrum to Castle: Classical to Medieval Fortifications in the Lands of the Western Roman Empire - J. E. Kaufmann, H. W. Kaufmann

Castrum to Castle: Classical to Medieval Fortifications in the Lands of the Western Roman Empire

Verdun 1916: The Renaissance of the Fortress - J. E. Kaufmann, H. W. Kaufmann

Verdun 1916: The Renaissance of the Fortress

The Atlantic Wall: History and Guide - J. E. Kaufmann, H. W. Kaufmann, Vladimir Tonic, A. Jankovic-Potocnik

The Atlantic Wall: History and Guide

The Maginot Line: History and Guide - Patrice Lange, J. E. Kaufmann, H. W. Kaufmann, Aleksander Potocnik

The Maginot Line: History and Guide