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Roscoe, John: The Northern Bantu.
Rocco, Sha: Ancient Sex Worship.
Rousselet, Louis: India and Its Native Princes.
Spencer, B.: Native Tribes of the Northern Territory of Australia.
Solas, W. J.: Ancient Hunters.
Starcke, C. V.: The Primitive Family.
Stevens, J.: Central America, Chiapez and Yucatan.
Symonds, J. A.: A Problem in Greek Ethics.