Columbia subject headings:
Civil law--International unification.
Contracts for work and labor service industries--Law and legislation--European Union countries--Codification.
Contracts for work and labor service industries--Law and legislation--European Union countries.
Obligations (Law)--European Union countries--Codification.
Obligations (Law)--European Union countries.
Property--European Union countries--Codification.
Property--European Union countries.
Harvard subject headings:
Contracts for work and labor--Europe.
Service industries--Law and legislation--Europe.
Princeton subject headings: