1.
Kardiologiia
; 17(12): 126-9, 1977 Dec.
Article
in Russian
| MEDLINE
| ID: mdl-599824
Subject(s)
Health , Heart Rate , Adolescent , Adult , Electrocardiography , Electrophysiology , Female , Humans , Male , Middle Aged , Reference Values , Time Factors
2.
Kardiologiia
; 17(9): 130, 1977 Sep.
Article
in Russian
| MEDLINE
| ID: mdl-926586