U.S. Dept. of Commerce, Patent and Trademark Office, Office of Technology Assessment and Forecast : for sale by the Supt. of Docs., U.S. Govt. Print. Off.[1979]<M351-43>
U.S. Dept. of Commerce, Patent and Trademark Office, Patent Documentation Organizations : for sale by the U.S. Government Printing Office, Superintendent of Documents19uu.<M351-18>