@misc{production2020,
  title = {Production of Mineral Raw Materials of Individual Countries}
  publisher = {Austrian Federal Ministry of Agriculture, Regions and Tourism (BMLRT)},
  url = {https://www.world-mining-data.info/wmd/downloads/XLS/6.6.Production_of_Mineral_Raw_Materials_of_individual_Countries_by_Countries.xlsx},
  year = {2020}
}