Sumatraantjes / door H.C. Zentgraaff en W.A. van Goudoever history of the British navy during the war : adapted from colonel John Buchan's "History of the war" / H.C. O'Neill war in Africa 1914-1917 and in the far East 1914 / H.C. O'Neill psychiatrische beoordeling van dienstweigeraars : clinische lessen / H.C. Rümke
