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

ENGINEERING
Tools, materials and methods
early applications of power
introduction of the steam-engine
further development of the steam-engine
some practical details
jets, rockets and turbines
internal-combustion engines
the motor car
the ship
aviation

ELECTRICITY
early history
direct current
power generation, distribution and utilization
audio engineering
radio
television and radar

ASTRONOMY
The sky
different kinds of time
the moon
the solar system
the stars
ER  -