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Ideas, methods, or systems.

Bibliographic Details
New Title:Works not protected by copyright
Format: Government Document Serial
Language:English
Published: Washington, D.C. : United States Copyright Office, Library of Congress
Series:Circular (Library of Congress. Copyright Office) ; 31.
Subjects:
Copyright > United States.
Online Access:https://purl.fdlp.gov/GPO/gpo86255
Description
Published:Ceased publication.
Physical Description:1 online resource.
Publication Frequency:Irregular