Kovalenko Natalia Petrivna. Crop rotations in agriculture of Ukraine: evolution of theory, methodology and practice of the second half of XIX - to beginning of XXI centuries : д.і.н. : spec.. 07.00.07 - Історія науки й техніки : presented. 2015-12-26; popup.evolution: .; National scientific agricultural library NAAN. – , 0515U001020.

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