The Pierre Auger Observatory II: Studies of Cosmic Ray Composition and Hadronic Interaction models (2011)

(untitled) - Collaboration, TPA; Abreu, P; Aglietta, M; Ahn, E; Albuquerque, I; Allard, D; Allekotte, I; Allen, J; Allison, P; Castillo, J; Alvarez-Muñiz, J; Ambrosio, M; et al.