Talk:String Quartet No.1, Op.22 No.1 (Enescu, George)

I am somewhat puzzled about the claim that this work is not PD. According to the publishers (Salabert) who published the work in 1921, it is still listed as 1921 on Durand-Salabert catalogues:

It has been 90 years since its publication, how is that not PD?

The only date I see in there is date of composition, not publication- all those dates on page 6 are dates of composition. I know of no publication by Durand or anyone else of the quartet before 1957. Eric 19:53, 9 May 2011 (UTC)