![](http://www.alamy.com/thumbs/6/2C62201D-0927-472B-ABF0-6926BCCFCFF4/2AH3XTM.jpg)
Blackboards with crayon, sponge and rag
Series with various signs for labeling.
Size: 4350px × 4350px
Photo credit: © marina_lohrbach / Alamy / Afripics
License: Royalty Free
Model Released: No
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