By Oppenheimer C.   Yirgu G.   in International Journal of Remote Sensing

ISSN:1366-5901|23|22|4777-4782

Taylor & Francis Ltd‎(2002)‎

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By Ayalew D.   Barbey P.   Marty B.   Reisberg L.   Yirgu G.   Pik R.   in Geochimica et Cosmochimica Acta

ISSN:0016-7037|66|8|1429-1448

Elsevier‎(2002)‎

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