![](http://www.alamy.com/thumbs/6/34E4A62B-B0C2-4B01-A974-E83E0F3C2D65/2F7XT4G.jpg)
Marva mongers, left E. coining and right D. Forest, let a weather balloon on and record the data for the Meteorological Service of MarineLiegkamp Valkenburg.
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Photo credit: © BTEU/NEDMIL / Alamy / Afripics
License: Licensed
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