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Hi,

May be of interest:

USGS Historical Topographic Map Explorer
http://historicalmaps.arcgis.com/usgs/

New York to LA: History of America’s Maps in One App
http://www.esri.com/esri-news/releases/14-3qtr/new-york-to-la-history-of-americas-maps-in-one-app?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Esri-News+%28ESRI.com+-+News%29


Happy Independence Day! (from last year) :
The Elements of a Good Firework Show
http://www.usgs.gov/blogs/features/usgs_top_story/the-elements-of-a-good-firework-show/?from=title


Enjoy the holiday!
Emily


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Emily Wild
Librarian (Physical Scientist)
U.S. Geological Survey
Denver Library
Box 25046, MS 914
Denver Federal Center
Denver, CO 80225-0046
ph: (303) 236-1003
[log in to unmask]

USGS Libraries: http://library.usgs.gov
Tutorials: http://tinyurl.com/lh3tmua
Professional Page: http://profile.usgs.gov/ecwild
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