Borodai, I. 2020 Jan 6. 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] 2:1