Heil deutschem Schwert! : Kriegs-und Vaterlandslieder von 1914-1915, mit Singstimmen und Klavierbegleitung / gesamm. von Robert Gersbach How America went to war : an account from official sources of the nation's war activities 1917-1920 : The road to France : the transportation … maréchal Foch / H. Robert Private papers of Douglas Haig, 1914-1919 : being selections from the private diary and correspondence of Field-Marshal the earl Haig of Bemersyde ... etc. / … grote luchtgevechten / Robert Jackson ; [vert. uit het Engels door T. Wesselink ; woord vooraf door Alan Clark] Ideas, concepts, doctrine : volume I : basic thinking in the United States Air Force 1907-1960 / Robert Frank Futrell
