BEGIN:VCALENDAR VERSION:2.0 PRODID:-//hacksw/handcal//NONSGML v1.0//EN TZ:+00 BEGIN:VEVENT DTSTART:20210520T000000Z DTEND:20210520T000000Z SUMMARY:International Conference on Raw Materials and Circular Economy - RawMat2021: Oral abstract deadline due before 20th May 2021 LOCATION:School of Mining and Metallurgical Engineering of the National Technical University of Athens,Athens,Greece END:VEVENT END:VCALENDAR