TY - JOUR A1 - Izdebski, Waldemar A1 - Skudlarski, Jacek A1 - Zając, Stanisław PB - The Lublin Branch of the Polish Academy of Sciences L2 - http://journals.pan.pl/Content/91848 PY - 2012 IS - No 2 T1 - Impact of agricultural tractors advancement on productivity of selected machine units UR - http://journals.pan.pl/dlibra/publication/edition/91848 T2 - Teka Commission of Motorization and Power Industry in Agriculture ER -