Hrapiychuk Igor Petrovith. Variety pekuliarities of fruit formation and tehnology of growing white clover for seeds under the conditions of Ukrainian Polissya : к.с.-г.н. : spec.. 06.01.14 - Насінництво : presented. 2006-02-14; popup.evolution: .; Institute of a sugar-beet. – , 0406U000704.

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