TY - GEN AU - Zera,E TI - [Polish cardiology in the last 30 years] SN - 0022-9032 PY - 1974///1002 KW - Cardiology KW - history KW - Electrocardiography KW - History, 20th Century KW - Intensive Care Units KW - Poland KW - Vectorcardiography N1 - Publication Type: Historical Article; Journal Article ER -