Various documents concerned with Sagol Kangjei, the traditional Manipur polo game from which polo is said to have originated. These are:
- Manipur Polo: XVIII All Manipur Polo Tournament and IV Women Polo Tournament 1997', Souvenir Programme
- 'History of Polo Game in Manipur' by L. Joychandra Singh, President, All Manipur Polo Association, Imphal
- Copy of 'Sagol-Kangjei (The Manipuri Pony Polo)' compiled and sent by P. Lalit downloaded from members.tripod.com, the Manipur Page, 30 July 1999
- Article on Wrestling/hockey, in Manipuri
- Copy of 'Joseph Ford Shere - Father of Polo' by Lt. Col. M. Ranjot Singh
- Copy of 'Sagol Kangjei: The Traditional Polo of Manipur' by Maisnam Khelen, Honorary Secretary, All Manipur Polo Association
- Copy of 'Sagon Kangjei (Polo)' by P.B. Singh published in Regional Integration (A Quarterly Journal)
- Copy of Souvenir Programme for Manipur Polo 1991
- Notes on polo - handwritten