Media type: E-Article Title: The Retractable Airplane Landing Gear and the Northrop "Anomaly": Variation-Selection and the Shaping of Technology Contributor: Vincenti, Walter G. imprint: JSTOR, 1994 Published in: Technology and Culture Language: Not determined DOI: 10.2307/3106747 ISSN: 0040-165X Keywords: Engineering (miscellaneous) ; History Origination: Footnote: