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J. M. Cork*, J. M. LeBlanc*, A. E. Stoddard*, D. W. Martin*, C. E. Branyan*, and W. J. Childs*
Phys. Rev. 83, 856 – Published 15 August, 1951
DOI: https://doi.org/10.1103/PhysRev.83.856
© 1951 American Physical Society