User talk:98.66.77.29

March 2009
Welcome to Wikipedia. The recent edit you made to the page Doppler effect has been reverted, as it appears to be unconstructive. Use the sandbox for testing; if you believe the edit was constructive, please ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you. Nsaa (talk) 21:22, 10 March 2009 (UTC)