Introduction to trademarks, copyrights, and patents in the United States / udarbejdet for kongelig Dansk Generalkonsulat, New York ; [prepared by Lett, Vilstrup & Partnere and Height, Gardner, Poor & Havens and Levy, Zito & Grandinetti]. (Udenrigsministeriet, Sekretariatet for udenrigshandel, 1996)