00305nam a2200109la 450000500170000000800370001708200220005410000250007624500530010126000330015430000080018720260128043411.0251201s9999    xx        000 0 und d  aKZ 1261bROZ 1976  aChristos L. Rozakis.  aThe concept of jus cogens in the law of treaties  aNew yorkbNorthhollandc1976  a206