I wonder why tunnels are round
Subtitle: and other questions about building
By: Steve Parker.
Edition: 1st American ed.
Series: I wonder why; I wonder why (New York, N.Y.)
Publisher: Kingfisher
Published: 1995
Place of publication: New York
Language: eng
Number of pages: 32
Subjects: Structural engineering -- Juvenile literature; Earthmoving machinery -- Juvenile literature; Structural engineering; Buildings; Earthmoving machinery; Questions and answers
Notes: Includes index.