Internetové zdroje
http://www.surnameweb.org/registry/h/r/c/hrcka.shtml Kde zili Hrckovci v USA v roku 1920: / Where was live a Hrcka people in USA in year 1920.: http://www.ancestry.com/search/SurnameP … =&ln=Hrcka Palo Hrcka http://hrcka.webpark.sk/ Michal Hrcka – harp http://www.obnova.sk, www.obnova.eu, www.spolocnost.obnova.sk...
