TY - JOUR T1 - Tribute to the father of Slovakian geology, Professor Ján Pettko, who was born in Horná Drietoma two hundred years ago JO - Acta Geologica Slovaca VL - 4 IS - 2 SP - 91 EP - 94 PY - 2012/2// T2 - Pred dvesto rokmi sa narodil v Hornej Drietome profesor Ján Pettko, otec slovenskej geológie AU - Michalík, Jozef SN - 1338-0044 M3 - UR - http://geopaleo.fns.uniba.sk/ageos/archive/2012_02/michalik_2012.pdf KW - Ján Pettko AB - Abstract ER -