Chandrasekhar, S. (1981). A dirty filthy book: The writings of charles knowlton and annie besant on reproductive physiology and birth control and an account of the bradlaugh. University of California Press.

Chandrasekhar, Sripati. A Dirty Filthy Book: The Writings of Charles Knowlton and Annie Besant on Reproductive Physiology and Birth Control and an Account of the Bradlaugh. Berkeley: University of California Press, 1981.

Chandrasekhar, Sripati. A Dirty Filthy Book: The Writings of Charles Knowlton and Annie Besant on Reproductive Physiology and Birth Control and an Account of the Bradlaugh. University of California Press, 1981.