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Portney's Ponderables Book Reviews: |
Other links |
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 Icarus Books
( under categories) Royal Institute of Navigation Bi-monthly newsletter November-December 2000 Air Force Navigators and Observers Association AOPA Flight Training Magazine February 2001 Scientium
(under books) Starpath Navigation School
(under books) Mercator's World Magazine GPS World MagazinePlanned for Sept. 2001 issue |
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