Kriegskunst der Preussen unter König Friedrich dem Grossen / Johann Heilmann : Erste Abteilung military classics Instructions for his generals / Frederick the Great ; transl. by Thomas R. Phillips Kriegskunst der Preussen unter König Friedrich dem Grossen / Johann Heilmann : Zweite Abteilung men-at-arms series Frederick the Great's army : Cavalery / text by Philip Haythornthwaite, colour plates by Bryan Fosten Pickelhauben (spiked helmets) : the glittering age, German headdress from the seventeenth to the twentieth century, 1650-1918 / Eric J. Johansson