I was a keynote speaker of International Conference on Green Energy and Environment 2019 on 3-4 September 2019 in Bangka Belitung, Indonesia.
https://www.flickr.com/photos/hadinur/albums/72157710733438192
I was a keynote speaker of International Conference on Green Energy and Environment 2019 on 3-4 September 2019 in Bangka Belitung, Indonesia.
https://www.flickr.com/photos/hadinur/albums/72157710733438192
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