TY  - GEN
AU  - Hart, H. L. A.
TI  - The concept of law
SN  - 9780199644698
U1  - 346 HAR 
PY  - 2012///
CY  - Oxfrod : 
PB  - Oxford University Press.
KW  - Law
KW  - The concept of law
N1  - Includes bibliographical references and index
ER  -