547,841 ANNUAL Annual Meeting of the American Academy for Cerebral Palsy and Developmental Medicine, 1989 : [abstracts 1989] / Alfred Healy, president, Dennis C. Harper, scientific program chair. - [London : Mac Keith Press, 1989]. - [2], 52, [2] s. ; 25 cm (Developmental Medicine and Child Neurology ; vol. 31, nr 5, suppl. 59)