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Manual of classification of subjects of invention of the United States Patent office.

APA Citation

United States. Patent Office. (1916). Manual of classification of subjects of invention of the United States Patent office. Washington: Govt. print. off..

MLA Citation

United States. Patent Office. Manual of Classification of Subjects of Invention of the United States Patent Office. Washington: Govt. print. off., 1916.

Warning: These citations may not always be complete (especially for serials).