TY  - BOOK
AU  - Ruiter,D.W.P.
TI  - Institutional legal facts: legal powers and their effects 
T2  - Law and philosophy library
PY  - 1993///
CY  - Dordrecht
PB  - Kluwer Academic
KW  - Legal positivism
KW  - Social institutions
KW  - Effectiveness and validity of law
KW  - Social norms
N1  - p.231-234
ER  -