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current | 19:50, 17 December 2014 | 3,139 × 2,941 (10.89 MB) | Mary Mark Ockerbloom | {{Photograph |photographer = {{unknown}} |title={{en|1= E. H. Johnson Ozone Production }} |description={{en|1= E. H. Johnson Ozone Production }} |depicted people = {{depicted person|E. H. Johnson}} |depicted place = Fixed Nitrogen Research Labora... |