TY - JOUR IS - 3 JA - Med Pr JO - Medycyna Pracy PY - 1996 SN - 0465-5893 VL - 47 AU - Bortkiewicz A AU - Zmyslony M AU - Gadzicka E AU - Szymczak W LA - pl N1 - FEMU ID: 7697; EMF-Portal URL: https://www.emf-portal.org/en/article/7697 SP - 241-252 TI - [Evaluation of selected parameters of circulatory system function in various occupational groups exposed to high frequency electromagnetic fields. II. Electrocardiographic changes] ER -