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Pulsations in the X-radiation of the Crab Nebula.
Ducros G, Ducros R, Rocchia R, Tarrius A. Ducros G, et al. Among authors: rocchia r. Nature. 1970 Jul 11;227(5254):152-4. doi: 10.1038/227152a0. Nature. 1970. PMID: 16057868 No abstract available.