1.
Rev Clin Esp
; 144(1): 27-32, 1977 Jan 15.
Article
in Spanish
| MEDLINE
| ID: mdl-841124
Subject(s)
Bundle-Branch Block/epidemiology , Humans , Occupations , Physical Exertion , Rest , Spain
2.
Rev Esp Cardiol
; 25(1): 59-67, 1972.
Article
in Spanish
| MEDLINE
| ID: mdl-5038566