Lazarsfeld, Paul - The Art of Asking WHY in Marketing Research: Three principles Underlying the Formulation of QuestionnairesProject reference.
Lepenies, Philipp - Possibilism: An Approach to Problem-Solving Derived from the Life and Work of Albert O. HirschmanProject reference.
Letter Sibyl Moholy-Nagy to Herbert Bayer, 1945Sibyl Moholy-Nagy on the uncertain future of the Institute of Design/New Bauhaus
Levenson, Bob - “Bill Bernbach's Book: A History of the Advertising That Changed the History of Advertising”Project reference.