Two legends of Madison Avenue will visit Duke University this spring to discuss the making of modern advertising and how the industry has evolved since the so-called "Mad Men" days.Kenneth Roman, former CEO of Ogilvy & Mather and author of the book, "The King of Madison Avenue," will give a talk, "David Ogilvy: The Original Mad Man," at 6 p.m. Tuesday, March 20 in Perkins Library's Gothic Reading Room.Charlotte Beers, also a former CEO of Ogilvy & Mather and former undersecretary of state for public affairs and public diplomacy, will speak next month, on Tuesday, April 10. Beers is the author of the new book, "I'd Rather Be in Charge." She will discuss advertising, women and leadership at her 6 p.m. talk in Perkins Library's Gothic Reading Room.Both talks will be preceded by a 5 p.m. reception and are free and open to the public. Roman and Beers will also sign copies of their books, available for sale at the events.The talks are part of a year-long lecture series marking the 20th anniversary of the Duke University Libraries' John W. Hartman Center for Sales, Advertising & Marketing History. Two additional lectures are planned for the fall.The Hartman Center, part of Duke's David M. Rubenstein Rare Book & Manuscript Library, is one of the foremost resources in the world for the documentation and study of advertising. It holds extensive collections of printed material, corporate records, photographs and audio-visuals that document the history of advertising, sales and marketing over the past two centuries.The center also holds the archives of leading advertising agencies, trade associations and industry figures, including J. Walter Thompson Company, Wunderman, the Outdoor Advertising Association of America and many others.For more information about the Hartman Center or the lecture series, visit the Hartman Center website.