TY  - BOOK
AU  - Spark, Gareth.
TI  - Vitiation of contracts: international contractual principles and English law 
SN  - 9781107031784 (hbk.)
U1  - 346.022 
PY  - 2013///
CY  - Cambridge, UK
PB  - Cambridge University Press
KW  - Impossibility of performance
ER  -