Blar i NGU Open Archive på forfatter "Yohannes, Ermias"
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Building-stone resources in Eritrea: results from introductory work in the NGU-EGS co-operation programme
Heldal, Tom; Yohannes, Ermias (NGU Bulletin (436), Journal article, 2000)Several building-stone quarries and prospects in Eritrea were visited during September 1998, as a part of the Norwegian.Eritrean ERINOR co-operation project. The bedrock geology of Eritrea comprises a variety of rocks, of ...