A history of the Imperial Service Troops of native states, with a short sketch of events in each state which have led to their employment in subordinate cooperation with the Supreme Government. Brig-Gen Stuart Beatson. Calcutta, Inspector-Gen, Imperial Service Troops, 1903.
Memorandum. Native states and armies. Owen Tudor Burne. India Office, 4 Apr 1873. with Memorandum by Captain Biddulph, ADC, on the Nepaul Army, dated Calcutta, 6th March 1873.
A short history of the services rendered by the Imperial Service Troops during the Great War 1914-18. Maj-Gen Sir Harry Watson. Calcutta: Govt of India, 1930.