The Incas knew
By: by Tillie S. Pine and Joseph Levine. Pictures by Ann Grifalconi.
Contributors: Levine, Joseph, 1910- joint author.; Grifalconi, Ann, illus.
Publisher: McGraw-Hill
Published: 1968
Place of publication: New York
Language: eng
Number of pages: 32
Subjects: Incas -- Juvenile literature.; Science -- Experiments -- Juvenile literature.; Incas.; Technology.
Description: Describes briefly several architectural and technological concepts important today which were discovered and employed by the Incas hundreds of years ago. Includes the building of suspension bridges, making of maps, use of calendars, and irrigation of crops.