TY  - BOOK
AU  - Watson,James D
TI  - The Double Helix
T2  - Penguin Readers (300 headwords Advanced) Level 6
SN  - 9781405882644
U1  - 823 21
PY  - 2001///
CY  - London
PB  - Longman
KW  - English stories
N1  - English stories
ER  -