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1. war-letters.com
Database of old war correspondence letters from the 1st and 2nd world war...
[ http://www.war-letters.com ]


2. Encyclopedia of Laser Physics and Technology
This encyclopedia explains basic terms and principles of laser physics and technology with some content added from other topics such as general opti...
[ http://www.rp-photonics.com ]


3. ancient-egypt-online.com
An introduction to many of the fascinating aspects of life in...
[ http://www.ancient-egypt-online.com ]


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