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The first visit of NI Vavilov to the United States in 1921 is the least studied period of the scientist's life. The documents and photographs first published in this paper provide a more detailed view of this trip, its objectives and results.doaj:1b882ad4e9814507898e1f0f0cd9b8d7 fatcat:7pfxavolbfe3xnmvtl6wnsctuy