![](http://www.alamy.com/thumbs/6/8B7B5FD4-4560-46F7-9A00-21FCA7815848/J4BDJH.jpg)
PSM V36 D327 Mean relative humidity in relation to cotton
Size: 2812px × 889px
Photo credit: © The History Collection / Alamy / Afripics
License: Licensed
Model Released: No
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