Pawlak J. EFFICIENCY OF ENERGY INPUTS IN POLISH AGRICULTURE. Rocz. Nauk. Ekonom. Rol. Rozw. Obsz. Wiej. [Internet]. 2012 Mar. 28 [cited 2026 Nov. 10];99(1):121-8. Available from: https://rnr.sggw.edu.pl/article/view/9128