Permissions
During the creation of "Wind: the invisible force", the following permissions have been given:

1. Images in section: Types of wind at:
   • /C001472/en/images/cockbob.jpg from Cockeyed Bob
     
   • /C001472/en/images/dustdevil.jpg from Dust devil
     
   • /C001472/en/images/haboob.jpg from Haboob wind
     
   • /C001472/en/images/types.jetstreams.jpg from Jetstream
     
   Are from Mike Ryder's Whirling winds of the world, e-mail message.
2. Beaufort scale table at: /C001472/en/development/beaufort.html and at http://lubrary.advanced.org/C001472/nl/development/beaufort.html from: Michigan State University, e-mail message from rtsmith@clunix.msu.edu.
3. Information about sirocco wind at /C001472/en/development/types.sirocco.html and at /C001472/nl/development/types.sirocco.html from: KNMI, e-mail message from somers@knmi.nl.

References
We have used the following resources to learn more about wind:

1. Website of the University of Illinois: "Online Meteoreology guides", last updated at: september 1999. Visited: march 2000.
   
2. J.Bos, Dr. J Hofker. "Topboek: De Geo geordend" Meulenhoff educatief. Amsterdam, 1995, pp58-64
   
3. Ad van Doorn, Ben Jansen, Jakob Schuiringa, "Wereldwijs MHV". Malmberg educatief, Den Bosch 1990 (updated 1993) page 39
   
4. Weather.com "Glossary", last revised: may 2000, (May 2000)
   
5. "Dan's Wild Wild Weather page", last revised 1999: " (June 2000)
   
6. Meteo France, "Website du Meteo France", last revised: 1999 (March 2000)
   
7. Reus, Paul "Wie was Buys Ballot?", last revised: 17-8-99 (April 2000)
   
8. Golden gate weather sevices, "Wind Names", last revised January 2000 (June 2000)