Waste heaps and work areas at Umm es-Sawan gypsum quarries

By | Published June 16, 2011 | Full size is 283 × 175 pixels

Waste heaps and work areas at Umm es-Sawan gypsum quarries

Waste heaps and work areas at Umm es-Sawan gypsum quarries

Waste heaps and work areas at Umm es-Sawan gypsum quarries

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