Title: Relatório da participação na 4a. reunião do Grupo Sectorial sobre Compostos Químicos no Ambiente-OCDE realizada em Paris, 24 a 26 de novembro 1972
Subjects: Congresses, Organisation for Economic Co-operation and Development, Organisation for Economic Co-operation and Development. Sector Group on the Unintended Occurrence of Chemicals in the Environment, Pollution