TY - BOOK ID - 141686771 TI - The is-ought problem : an investigation in philosophical logic PY - 1997 PB - Dordrecht Boston London Kluwer Academic DB - UniCat KW - Logic KW - Deontic logic UR - https://www.unicat.be/uniCat?func=search&query=sysid:141686771 AB - ER -