TY - JOUR A1 - Helsper, Christoph T1 - Measurement Techniques For Ultrafine Particles T2 - Ultrafine aerosols. Properties and behaviour. Proceedings of the 1. International Workshop on Ultrafine Aerosols of the Sonderforschungsbereich 209 'Stoff- und Energietransport in Aerosolen' -'Mass and energy transfer in aerosols'-, held at the Univ. of Duisburg on Sept. 29, 1986 Y1 - 1986 UR - https://opus.bibliothek.fh-aachen.de/opus4/frontdoor/index/index/docId/2289 N1 - International Workshop on Ultrafine Aerosols ; (01) CY - Duisburg ER -