TY  - BOOK
TI  - The new universal library: volume eighteen  
U1  - 031.2 20
PY  - 1969///
CY  - London
PB  - International Learning Systems Corporation Ltd
KW  - encyclopedias  and dictionaries
KW  - library
N1  - CONTENTS

THE YOUNGER ENGINEER
Explaining mechanical things to children
helping daddy to mend things that go wrong
what's inside
e.tc

THE YOUNG SCIENTIST
mechanics
sound
light
heat
air and water
magnetism and electricity

ER  -