Sproge I, Curkina I, Jekabsone S, Tsilibina V, Rumyantseva J, Piletsky K. Production and Foreign Trade of Mineral Products in Latvia and Belarus. ETR [Internet]. 2015 Aug. 6 [cited 2024 Nov. 21];1:240-5. Available from: https://journals23.rta.lv/index.php/ETR/article/view/830