When coal turned gold.

Geahča maid

• When coal turned gold - the making of maharatna company
  Dahkki: Bhattacharyya, P
  Almmustuhtton: (2018)
• Chemistry and technology of coal
  Dahkki: Speight, J
  Almmustuhtton: (1994)
• THE STORY BEHIND COAL
  Dahkki: SOMERVIL BARBARA
  Almmustuhtton: (2019)
• The Story Behind Coal
• Turning garbage into Gold : an introduction to vermiculture biotechnology
  Dahkki: Bhawalkar, Uday
  Almmustuhtton: (1993)