Imperial Service Troops army list.
India.Army Department.
Calcutta : Supt. of Govt. Printing,
-1921.
"Compiled by the Office of the Inspector General, Imperial Service Troops."
"Owing to strikes of the Press employees it was not found possible to publish the Imperial Service troops army list for July 1920. This edition is published to cover the period since January 1920." -- memorandum slip, Jan. 1921 issue.
India. Army.
Indian State Forces army list