Ware,Caroline F., Panikkar,K.M., & Romein,J.M. (1966). The twentieth century: Publ. for the Intern. comis. for a history of the scientific and cultural development of mankind. P. 2-4: The transformation of societies; the self-image and aspirations of the peoples of the world; expression. London: Allen & Unwin.

Ware,Caroline F., Panikkar,K.M, and Romein,J.M. The Twentieth Century: Publ. for the Intern. Comis. for a History of the Scientific and Cultural Development of Mankind. P. 2-4: The Transformation of Societies; the Self-image and Aspirations of the Peoples of the World; Expression. London: Allen & Unwin, 1966.

Ware,Caroline F., Panikkar,K.M, and Romein,J.M. The Twentieth Century: Publ. for the Intern. Comis. for a History of the Scientific and Cultural Development of Mankind. P. 2-4: The Transformation of Societies; the Self-image and Aspirations of the Peoples of the World; Expression. London: Allen & Unwin, 1966.