Agriculture in the Middle Ages

1951. OCLC 1428574.  Curta, Florin; Kovalev, Roman (编). The other Euorope in the Middle Ages: Avars, Bulgars, Khazars and Cumans.. Kononklijke Brill N

and legal violence, Simmons, Clare (编), Medievalism and the Quest for the "Real" Middle Ages, Routledge: 61–86, 1997 [2021-10-09], ISBN 978-0-7146-5145-3

of the Slavic Languages, a descendant of the Indo-European Languages, itself a descendant of Proto-Indo European languages. In the early Middle Ages, before

永續農業（英語：Sustainable agriculture）亦稱可持續農業，是採用生態學原則的農耕方法，在學術上指探討生物與其環境互動的一門學科。 于荷兰举办的"可持续农业和农村发展会议" ,发布的《丹波宣言》中对可持续农业的定义为, "可持续农业是采取某种使用和维护自然资源的基础方式，以及实

Decker 2009. Ashtor, E. A Social and Economic History of the Near East in the Middle Ages. Berkeley: University of California Press. 1976.  Bolens, L