@article{Dixon:1958zz, author = "Dixon, F. P. and Walker, R. L.", title = "{Photoproduction of Single Positive Pions from Hydrogen in the 600- to 1000-Mev Region}", doi = "10.1103/PhysRevLett.1.458", journal = "Phys. Rev. Lett.", volume = "1", pages = "458--460", year = "1958" }