Rowbotham, Judith: ‘How To Be Useful in War Time’ Queen Mary’s Leadership in the War Effort 1914–1918, in: Glencross, Matthew / Rowbotham, Judith (eds.): Monarchies and the Great War (Palgrave Studies in Modern Monarchy), Cham 2018 Palgrave Macmillan, pp. 191-223.