719,588 ; 720,007 INTERNATIONAL XVIII International Congress Oh Electrocardiology : 32nd International Symposium On Vectorcardiography Warsaw - Poland - Victoria Hotel August 24th - 26th 1991 : abstracts / Org. under the auspicies: International Council on Electrocardiology... ; [prep, b J. Jagielski, M. Górnicki]. - Wroclaw : Medical Academy, August 1991. - 116 s. ; 21 cm