Talk:Campbell diagram

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Dear Redtricycle, Could you be more specific about your citation and verification request? --Dontknowhow (talk) 23:03, 8 December 2010 (UTC)[reply]

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)[reply]

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)[reply]

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