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| À i LR Cra o RN. ENT. 
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Fig. 2 LANDSAT/MSS image observed on October 21, 1983 
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E " " E—L—EF—1—) Kilometers ail 
    
Fig. 4. LANDSAT/MSS image observed on October 13, 1989 
ult: A A ^t 
Fig. 5 LANDSAT/MSS image observed on September 17, 1991 
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b