Niewiadomski K. Directions of Development for Areas with Unfavourable Conditions for Agricultural Production, an Example of the Podlaskie Voivodeship (Poland). jard [Internet]. 31Dec.2012 [cited 27Apr.2024];23(1):71-4. Available from: http://www1.up.poznan.pl/jard/index.php/jard/article/view/504