551,168 WIDMARK CARL Fetal electrocardiogram : relationships to oxygen lack, maturation and growth retardation : an experimental study : [akademisk avhandling] / by Carl Widmark ; Department of Physiology University of Göteborg. - Göteborg : University, 1991. - 80, 52 s. wiele liczb. : wykr. ; 24 cm Zawiera 5 prac współaut. ISBN 91-628-0379-4