Hi from Paris,
In France, each new publication, newspaper, book,... must do a legal deposit of one or two items to French National Library.
It was a way to get free a sample of any new publication.
I don't know if same legal obligation was in USA : in past ? now ?
You could ask Library of Congress, New York Public Library and of course Yivo.
And why not "Forward / Forverts", oldest Yiddish newspaper (1897) still printed in NYC.
Archives and history of Medem Center - Arbeter Ring (Bund / Workmen Circle) of France