User:M6.8moo/sandbox

I found some sources on the reference were unavailable. I will have to find alternative source for them next week.

(Sources 3, 8, and 9)

I found alternative source for [3] and replace it.

I read through the article and there is no correction about language, but I felt uncomfortable to read this sentence: "Although the original production was not a success, the 20-minute suite that Tchaikovsky extracted from the ballet was."