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Jantra khettra deepica, or, A treatise on "citara," containing all the requisite precepts and examples on the rudiments of Hindoo music, intended as an introduction to the study of the above instrument. Illustrated with various exercises and ninety four airs arranged in the present system of Hindoo notation / by Rajah Sourindra Mohuna Thakoora. Public Domain Mark. Source: Wellcome Collection.