El Urogallo, number 15-17. Multiple articles about Marcel Duchamp [copy]. Includes "Marcel Duchamp en Barcelona" by Antoni Tàpies, "Marcel Duchamp Cartas a Stauffer," "Marcel Duchamp La saludable presistencia del enigma" by Gloria Moure, "Marcel Duchamp Tranzando una espiral en seis movimientos" by Chema Cobo, and "Marcel Duchamp Campos Duchamp" by José Luis Brea.