00330nam a2200109Ia 4500082002100000100006300021245008200084260003500166300000900201500000500210700000500215  a338.002bUn58.IS  aUnited Nations. Department of Economic and Social Affairs.  aInternational standard industrial classification of all economic activitiesb  aNew YorkbUnited Nationsc1968  a48p.  a  a