Welford, A. T. Skilled performance : perceptual and motor skills / A. T. Welford ; Lyle E. Bourne, Jr., consulting editor - Foresman : Glenview, Ill : Scott, 1976 - xiv, 200 p. : ill. ; 24 cm. Includes index. Bibliography: p. 169-190. ISBN: 0673077098 Subjects--Topical Terms: Motor ability and intelligenceSocial interaction