Nedelchev, N., Kondarev, M. Viticulture (Vinogradarstvo), 1959. In Russian.

Проф. Н. Неделчев, Проф. М. Кондарев.
Виноградарство: Учебник для студентов Софийского и Пловдивского высших сельскохозяйственных институтов.
Перевод с болгарского Е. Павловой и др. Под редакцией В. Римша.
2-е изд., перераб.
София: Земиздат, 1959.
395 с. : ил. ; 25 см. Тираж 10,060 экз. Твердый издательский переплет.
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Prof. N. Nedelchev, Prof. M. Kondarev.
Viticulture (Vinogradarstvo). Textbook for students of the Sofia and Plovdiv Higher Agricultural Institutes.
Translated from Bulgarian by E. Pavlova et al. Edited by V. Rimsha.
2nd ed., revised. 
Sofia: Zemizdat, 1959.
395 pp. : illus. ; 25 cm. Edition of 10,060 copies. Publisher's hardcover.

This 1959 comprehensive manual, translated from the Bulgarian, represents a significant academic collaboration within the Eastern Bloc’s agricultural sciences during the late 1950s. The text provides a deep dive into the internal logic of professional vine growing, including the arrangement of exhaustive sections on the biological characteristics of the grapevine, selection and breeding of European and local Bulgarian varieties, and advanced agrotechnical methods for soil cultivation and pest control. Under the expert authorship of Professors Nedelchev and Kondarev, the volume synthesizes the rich traditions of Bulgarian viticulture with the modern scientific rigor required for university-level education in Sofia and Plovdiv.  As a vital primary source, this volume documents the systematic approach to vineyard establishment, pruning techniques, and the physiological processes of grape maturation that defined Balkan oenology in the mid-20th century. The work is notably enhanced by numerous technical illustrations and diagrams detailing vine grafting and trellis systems. Published by the specialized agricultural house "Zemizdat" in an enlarged format, this second revised edition is a significant bibliographical rarity for ampelographers, agronomists, and collectors of scientific literature related to the history of winemaking and horticulture.