Dear Mattheson78, Unfortunately, we cannot be a literally perfect mirror for Sibley because Canada's copyright law is based on life-plus-50 years. Thus, composers who died less than 50 years ago - like Lourie and Alexandrov - are not free in Canada and cannot be uploaded here. The vast majority of the Sibley collection is fine, of course. Just watch out some of the cases like this. Grainger and Kreisler are another two I can think of off the top of my head. Thanks, Carolus 23:48, 14 June 2009 (EDT) (IMSLP Copyright Admin)
Mischa Elman's violin arrangements are another 'gotcha' in the Sibley collection. Since Elman died in 1967, his work will not be free in Canada until 2018. They've got a fair number of his arrangements, too. Thanks, Carolus 02:57, 20 June 2009 (EDT)
Sorry I had to blast the Holst Perfect Fool. The arrangement by Vally Lasker (1885-1978) is still protected in Canada (also in the EU) since he lived to be 92 or 93. Carolus 20:55, 28 June 2009 (EDT)
Hello Mattheson78, First of all, thanks for all of the help with the Sibley mirroring. We're glad to that you're filling in some of the holes of this collection here. What follows is for future reference only, obviously.
1. We capitalize opus numbers and use no space after the abbreviation. Thus the official style you will see used on pages here is Symphony No.5, Op.67 not "Symphony No. 5, op. 67."
2. When you run into a work like Rebikov's Op.33, we use a single page for the opus instead of multiple pages for each individual item.
Taking these factors into account when adding items saves the admins and cleanup volunteers time, which makes titles available for download faster. Thanks, Carolus 00:51, 18 June 2009 (EDT)