TY  - BOOK
AU  - Doyle,Arthur Conan
TI  - The sign of Four / 
T2  - A Penguin book. 
SN  - 0-14-005855-9
PY  - 1985///
CY  - Harmondsworth (Gran Bretanya) [etc.] : 
PB  - Penguin Books, 
KW  - Lengua inglesa
N1  - Reimpressions: 1987
ER  -