Bernal, J. D. (1972). The extension of man: : a history of physics before 1900 (1ª ed.). London: Weidenfeld and Nicolson.
Cita MLA (8 ed.) (Copiar al portapapeles)Bernal, J. D. The Extension of Man: : A History of Physics Before 1900. 1ª ed. London: Weidenfeld and Nicolson , 1972.