@misc{Kozioł_Wiesław_Mining,,
 author={Kozioł, Wiesław and Baic, Ireneusz},
 address={Koszalin},
 howpublished={online},
 publisher={Politechnika Koszalińska},
 language={eng},
 type={artykuł w czasopiśmie},
 title={Mining, production and development of small fractions of gravel and sand aggregates in north-western Poland},
 keywords={rock raw minerals, gravel and sand aggregates, gravel and sand extraction},
}