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Graffi, A., T. Schramm, E. Bender, I. Graffi, K. H. Horn, and D. Bierwolf. Cell-free Transmissible Leukoses in Syrian Hamsters, Probably of Viral Aetiology. Nature Publishing Group, 1968.

Graffi, A., et al. Cell-free Transmissible Leukoses in Syrian Hamsters, Probably of Viral Aetiology. Nature Publishing Group, 1968.