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© Ciel Extrême, 1998
Copyright
 
The pages you are about to browse or have been browsing are the results of a volunteer work to the service of the amateur community. All rights reserved: material (text and images) presented may not be reproduced in any manner without written (or e-mail) permission from webmaster and authors.
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If you wish to use part of the material on this site for an amateur publication, a lecture, an exhibition, in a non-profit manner, simply mention this site and the publication Ciel Extrême or add the simple aknowledgment: 
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Thank you in advance for your courteousness in complying with these rules that preserve the deserved authors' credits. Merci de bien vouloir par votre courtoisie respecter ces quelques règles qui garantissent aux auteurs la reconnaissance qu'ils méritent. Besides, e-mail agreements are easily carried out and authors are willing to share their observations, so please keep us informed.