Gies, Frances.

Cathedral, forge, and waterwheel :technology and invention in the Middle Ages /Frances & Joseph Gies. --
New York :HarperCollins Publishers,c1994.

357 p. :ill.

Includes bibliographical references (p. 293]-343) and index.

1.Technology--History.2.Inventions--History.Dynamic Details
#78LCCN:93-14293609.4/09/02