Ilkovičová, Ľubica, 1964- Mining educational trail in Slovakia / aut. Ľubica Ilkovičová, Ján Ilkovič. -- 2-s2.0-85132820993. -- 000816266300001. -- 000816266300001. Ilkovič, Ján, 1957- In: Land. -- ISSN 2073-445X. -- Vol. 11, iss. 6 (2022), art. no. 936 [25 s.].