1. Ostwald, W. Improvements in the Manufacture of Nitric Acid and Nitrogen Oxides. GB 190200698 A, published Jan 9, 1902, issued March 20, 1902.
2. Ostwald, W. Improvements in and relating to the Manufacture of Nitric Acid and Oxides of Nitrogen. GB 190208300 A, published Dec 18, 1902, issued Feb 26, 1903.
3. The Haber-Bosch Process and the Development of Chemical Engineering
4. The Nobel Prize in Chemistry 1918. Nobelprize.org. Nobel Media AB. http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1918/ (accessed Feb 3, 2018).
5. The Nobel
Prize in Chemistry 1931. Nobelprize.org.
Nobel Media AB 2014. http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1931/(accessed Feb 3, 2018).