[1]
Tworek, S., Golawski, A., Jobda, M. ja Kosicki, J.Z. 2017. The varying impact of agri-environment schemes on birdlife in two regions of Poland. Ornis Fennica. 94, 2 (heinä 2017), 101–112. DOI:https://doi.org/10.51812/of.133916.