TY  - BOOK
AU  - Hann, Judith
TI  - How science works : fascinating projects and experiments that reveal the secrets of science
T2  - Eyewitness science guides
SN  - 0863186025
U1  - 500 
PY  - 1993///
CY  - London
PB  - Dorling Kindersley
KW  - Science
ER  -