TY - CPAPER AU - Orolin, Peter AU - Mandula, Jan TI - R - MATERIAL AS A LAYER OF RAILWAY TRACKBED T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on ECOLOGY, ECONOMICS, EDUCATION AND LEGISLATION PY - 2013 SP - 797 EP - 804 pp DO - 10.5593/sgem2013/be5.v1/s20.105 PB - Stef92 Technology ER -