(1980). The concise guide to patents trademarks and copyrights editor: Solomon J. Schepps. Bell.
Lua i Stíl Chicago (17ú heag.)The Concise Guide to Patents Trademarks and Copyrights Editor: Solomon J. Schepps. Bell, 1980.
Lua MLA (8ú heag.)The Concise Guide to Patents Trademarks and Copyrights Editor: Solomon J. Schepps. Bell, 1980.
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