TY  - BOOK
AU  - 
TI  - Copyright contracts 
SN  - (978)+9028607072 
U1  - 346.048 2 
PY  - 1977///
CY  - Alphen aan den Rijn
PB  - Sijthoff
KW  - Authors and publishers
KW  - Congresses
KW  - Copyright
KW  - Contracts
ER  -