I wonder why tunnels are round : and other questions about building /

Parker, Steve, 1952-

I wonder why tunnels are round : and other questions about building / Steve Parker. - 1st American ed. - New York : Kingfisher, 1995. - 32 p. : col. ill. ; 29 cm. - I wonder why . - I wonder why (New York, N.Y.) .

Includes index.

0753405229


Structural engineering--Juvenile literature.
Earthmoving machinery--Juvenile literature.
Structural engineering.
Buildings.
Earthmoving machinery.
Questions and answers.

TA634 / .P37 1995

624