United States. Patent Office. (1969). Directory of registered patent attorneys & agents as of December 1968. [Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.].
Chicago Style CitationUnited States. Patent Office. Directory of Registered Patent Attorneys & Agents As of December 1968. [Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1969.
MLA CitationUnited States. Patent Office. Directory of Registered Patent Attorneys & Agents As of December 1968. [Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1969.
Warning: These citations may not always be 100% accurate.