Mappae clavicula : a little key to the world of medieval techniques / [Edited and translated by] Cyril Stanley Smith and John G. Hawthorne.

v, 242 pages : illustrations (some color) ; 26 cm.

Understanding use : objects in museums of science and technology / edited by Tim Boon, Elizabeth Haines, Arnaud Dubois, and Klaus Staubermann ; managing editor, Kristin Frederick-Frost, Smithsonian Institution.

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Mappae clavicula : a little key to the world of medieval techniques / [Edited and translated by] Cyril Stanley Smith and John G. Hawthorne.

Understanding use : objects in museums of science and technology / edited by Tim Boon, Elizabeth Haines, Arnaud Dubois, and Klaus Staubermann ; managing editor, Kristin Frederick-Frost, Smithsonian Institution.