यो Book आफ्नो भाषा मा अवस्थित छैन, हेर्नुहोस्: English (en),
अथवा गुगल अनुवाद प्रयोग:  

Scientific principles, inventions, and chemical, mechanical, and industrial processes are explained for the general reader with the help of drawings and diagrams.

Publication Details

  • Publisher: Simon and Schuster
  • Dewey Decimal: 603.
  • ECHO Library: 603. VAN