Media type: E-Article Title: Hidden Skills: A Dynamic Systems Analysis of Treadmill Stepping during the First Year Contributor: Thelen, Esther; Ulrich, Beverly D.; Wolff, Peter H. Published: JSTOR, 1991 Published in: Monographs of the Society for Research in Child Development, 56 (1991) 1, Seite i Language: Without Specification DOI: 10.2307/1166099 ISSN: 0037-976X Origination: Footnote: