RT Journal Article SR Electronic T1 Gross motor performance and the educationally sub-normal child [proceedings] JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 180 OP 180 DO 10.1136/bjsm.11.4.180 VO 11 IS 4 A1 L. Burwitz A1 P. W. Harrison A1 B. Davies A1 A. Daggett A1 J. Montgomery YR 1977 UL http://bjsm.bmj.com/content/11/4/180.abstract AB