Talk:Campbell diagram

Dear Redtricycle, Could you be more specific about your citation and verification request? --Dontknowhow (talk) 23:03, 8 December 2010 (UTC)
 * request removed Dontknowhow (talk) 09:56, 8 July 2011 (UTC)

Example of Campbell diagram in Rotordynamics
The "Example of Campbell diagram in Rotordynamics" is a resume of an external page. It would be more appropriate to quote it without reproducing the text. — Preceding unsigned comment added by Dontknowhow (talk • contribs) 07:32, 25 May 2011 (UTC)

second link not working
the 2nd link in the listing doesn't work. probably it is no longer existing. — Preceding unsigned comment added by 79.235.247.233 (talk) 13:42, 2 August 2011 (UTC)

The 3rd link is inactive, too, as of 2020-09-10 Voitcus (talk) 09:04, 10 September 2020 (UTC)