Thanks Brewster. Disques is the latest in a National Recording Preservation Board sponsored project to scan historical serials about audio and record collecting and post them to Archive.org for public access. I've written a bit for the ARSC Blog (http://arsc-audio.org/blog/) about some completed projects, and plan to write about the most recent (Hillandale News) and current (Disques/TNR) soon.
We're always looking for good-condition, unbound copies of related magazines in the public domain or with the potential to clear rights. We've found that many magazine publishers never renewed copyright, pushing public domain into the 60s, and some never registered or included printed notice, pushing public domain into the 70s or 80s (see http://copyright.cornell.edu/resources/publicdomain.cfm).
To address Nick's suggestion, I don't think the French Disques is PD, unfortunately. For all of the complication of U.S. audio copyrights, I've found U.S. print copyrights less restrictive in dealing (pre-'78) with publication dates rather than contributors' lifetimes.
If anyone reading has got a collection they want to loan or a suggestion for us to look into, please write me off-list. And thanks to those who have contributed so far!
Mason Vander Lugt
Recorded Sound Processing Technician
National Recording Preservation Board Assistant
National AV Conservation Center
Library of Congress