Stoleski, S., Minov, J., Mijakoski, D. and Karadzinska-Bislimovska, J. 2015. Chronic Respiratory Symptoms and Lung Function in Agricultural Workers - Influence of Exposure Duration and Smoking. Open Access Macedonian Journal of Medical Sciences. 3, 1 (Jan. 2015), 158–165. DOI:https://doi.org/10.3889/oamjms.2015.014.