Checked content

File:Production of ammonia.svg

English: Production of ammonia 1946–2007
Deutsch: Ammoniakproduktion 1946–2007
Date 26 August 2009
  • derivative work: Leyo

Applications-graphics.svg This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: language-neutral version. The original can be viewed here: Ammoniakproduktion.svg. Modifications made by Leyo.

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