Davis, J. A. (1996). Encyclopaedia of scientific developments inventions and discoveries. Bhavana Books and Prints.
Chicago-referens (17:e uppl.)Davis, J.R. Ainsworth. Encyclopaedia of Scientific Developments Inventions and Discoveries. New Delhi: Bhavana Books and Prints, 1996.
MLA-referens (9:e uppl.)Davis, J.R. Ainsworth. Encyclopaedia of Scientific Developments Inventions and Discoveries. Bhavana Books and Prints, 1996.
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