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     I am looking for maps of the mountain passes between Argentina and
     Chile for a study to promote economic growth in the region by
     improving transport corridors. Any digitized maps suitable for use as
     GIS layers would be great, but I'd be just as happy to get paper maps
     at better than 1:1,500,000 scale. I know the more traditional sources
     for satellite imagery, but as this is an international development
     project funding is very limited for map purchases. Any tips you might
     have would be greatly appreciated. Thanks!  Michelle Morgan
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