Surface. 31/9/2019 - 31/10/2019. Pressure corrected data. 
 
Low Background Laboratory Institute od Physics Belgrade. 
 
10/01/2019 01:00, 665684
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10/10/2019 00:00, 652836
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10/11/2019 00:00, 655402
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10/14/2019 00:00, 655337
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10/16/2019 00:00, 652556
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