Ramps.
By: Illustrated by Barbara Efting.
Contributors: Efting, Barbara, illus.
Edition: [1st ed.]
Publisher: Hawthorn Books
Published: 1969
Place of publication: New York
Language: eng
Number of pages: 32
Subjects: Inclined planes -- Juvenile literature.; Inclined planes.
Description: An introduction to the various kinds of ramps, including hills, wedges, and screws, and how they help lift and lower things.
Notes: Published under the author's earlier name: Bernice Kohn.