Machines that do man's work
By: by James and Mary Williams.
Contributors: Williams, Mary, joint author.
Series: Unit study book;; No. 659
Publisher: American Education Press, Inc.
Published: 1939
Place of publication: [Columbus, O; New York City
Language: eng
Number of pages: 32
Subjects: Machinery -- Juvenile literature.
Genres: Juvenile literature.
Notes: Cover-title.