Cardiac arrhythmias in the active population:   prevalence, significance and management:   proceedings of a conference held in Koge, Denmark, October 4-5, 1979, sponsored by the European, Danish and Swedish Societies of Cardiology in collaboration with AB Hassle, Molndal, subsidiary of AB Astra, Sweden /   edited by D.A. Chamberlain ... [et al.]   - [Sweden]   [Astra]   1979   - 149p   25cm