I wonder why tunnels are round and other questions about building

Parker, 1952-

I wonder why tunnels are round and other questions about building / Steve Parker. - Danbury Grolier Incorporated 1995. - 32p. col. ill. 29cm - I wonder why .

Includes index

1856973107


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

624 PAR 1995