The Linguistic Survey of India is a comprehensive survey of the languages of British India, describing 364 languages and dialects. It was a project of the British Raj conducted between 1894 and 1928, under the direction of George A. Grierson, an official of the Indian Civil Service. Vol V part II covers Bihari and Oriya. Это и многое другое вы найдете в книге Linguistic Survey of India Vol V Part II (G. A. Grierson)