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Scientific Journal of the Military University of Land Forces > 2020 > Vol. 52, No. 4(198) > 918--930
Gospodarka Materiałowa i Logistyka > 2020 > nr 11 > 2--12
Geology, Geophysics and Environment > 2020 > Vol. 46, no. 2 > 175--182
Safety & Defense > 2020 > 2 > 21--50
Geological Quarterly > 2020 > Vol. 64, No. 3 > 801--806
Geological Quarterly > 2020 > Vol. 64, No. 3 > 766--780
Journal of Computer Sciences Institute > 2020 > Vol. 15 > 133--138
Safety & Defense > 2020 > 1 > 119--127
Builder > 2020 > R.24, nr 7 > 26--28
Geological Quarterly > 2020 > Vol. 64, No. 2 > 342--376
Geological Quarterly > 2020 > Vol. 64, No. 1 > 185--196
Geological Quarterly > 2020 > Vol. 64, No. 1 > 86--103
Fibres & Textiles in Eastern Europe > 2020 > Vol. 28, no. 1 (139) > 14--19
Acta Poligraphica > 2020 > Vol. 15 > 19--33
Hereditas Minariorum > 2020 > Vol. 6 > 85--94
AGH Drilling, Oil, Gas > 2020 > Vol. 37, no. 2 > 5--14
Energy Policy Studies > 2020 > No. 2 (6) > 43--53
Organizacja i Zarządzanie : kwartalnik naukowy > 2020 > nr 4 > 147--158
Prace Komisji Geografii Komunikacji PTG > 2019 > nr 22(4) > 34--45