Firstbrook, Ibid., p. 126; Arthur Asa Grandville Carscallen, Elementary grammar of the Nilotic-Kavirondo language (Dhö Lwo), together with some useful phrases, English-Kavirondo and Kavirondo-English vocabulary, and some exercises with key to the same. London: St. Joseph's Foreign Missionary Society, 1910.; Dictionary of African Christian Biography — Arthur Asa Grandville Carscallen.
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Luo at Ethnologue (18th ed., 2015) (subscription required)
