TY  - BOOK
AU  - Parker,Steve
TI  - Tunnels are round and other questions about building
T2  - I wonder why series
SN  - 9781856975803
U1  - 690 
PY  - 1995///
CY  - Danbury, Connecticut
PB  - Grolier, Inc.
KW  - Buildings
KW  - Earthmoving machinery
KW  - Structural engineering
KW  - Children's questions and answers
N1  - Includes index; Primary
N2  - Illustrations and text provide the answers to thirty-three unusual questions about buildings, tunnels, bridges, and machinery
ER  -