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\section*{1991}

Enric Marti, Jordi Regincos, Jaime Lopez-Krahe, \& Juan J.Villanueva. (1991).\textbf{" A system for interpretation of hand line drawings as three-dimensional scene for CAD input" } In \textit{Proceedings of the First International Conference on Document Analysis and Recognition} (pp. 472--480).

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