Beach, A. S.Beatty, J. J.Bhattacharyya, A.Bower, C.Coutu, S.2004-12-032004-12-0320012001http://hdl.handle.net/2003/200310.17877/DE290R-11696enThe American Physical SocietyPhysical Review Letters530Measurement of the Cosmic-Ray Antiproton-to-Proton Abundance Ratio between 4 and 50 GeV10.1103/PhysRevLett.87.271101article (journal)