Švarta, Agrita, and Jānis Vigovskis. “ECOLOGICALLY SAFE GROWING TECHNOLOGIES FOR SPRING BARLEY ON ORGANIC FARMING”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 18, 2005): 128–134. Accessed November 23, 2024. https://journals.ru.lv/index.php/ETR/article/view/2148.