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Jeremy York wrote me this some minutes ago.http://www.hathitrust.org has a new interface."10,720,385 total volumes5,614,463 book titles278,213 serial titles3,752,134,750 pages481 terabytes127 miles8,710 tons3,363,612 volumes(~31% of total) in the public domain"The percentage of the PD world-wide volumes is 64,4 % of all PD-volumes (including the PD-US works). [Corrected.]