AU  - BOYD,JOE
AU  - WHITELAW,WALTER
TI  - UNDERSTANDING SCIENCE 1
T2  - UNDERSTANDING SCIENCE
SN  - 0719546214
U1  - 500.076/BOY 
PY  - 1991///
CY  - LONDON
PB  - JOHN MURRAY PUBLISHERS, LTD.
KW  - SCIENCE
KW  - EDUCATION
KW  - WATER
KW  - ELECTRICITY
KW  - MEASURING
KW  - ENERGY
KW  - REPRODUCTION
ER  -