TY  - GEN
AU  - Christie, Agatha.
TI  - The Big Four
SN  - 0007120818
U1  - 823.912 
PY  - 1927///
CY  - London
PB  - Collins
KW  -  1.Poirot, Hercule (Fictitious character) --Fiction.2. Private investigators --England --Fiction
ER  -