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CLARKSON, WILLIAM: A Grammar of the Gujarâti language. Bombay, American Mission Press, T. Graham, 1847.

FORBES, DUNCAN: A Grammar of the Hindustani Language, in the Oriental and Roman Character. ... To which is added, a copious selection of easy extracts for reading in the Persi-Araic & Devanagari characters, forming a complete introduction to the Bagh-o-Bahar. London 1846.

[RIVER CROSSING PUZZLE]. (A wolf, goat and cabbage problem). Sweden about mid 19th century.

SMITH, EDWIN, WILLIAM: The Ila-Speaking Peoples of Northern Rhodesia. Two volumes. London, Macmillan and Co., 1920.