Borodai, Iryna. " The serial publications as sources of research on the history of agricultural experimental work in Ukraine" Universum Historiae et Archeologiae = The Universe of History and Archeology = Універсум історії та археології = Универсум истории и археологии ISSN 2664-9950 (Print) ISSN 2707-6385 (Online) [Online], Volume 2 Number 1 (6 January 2020)