Jouhikko - Wikipedia
A bit off the top: Essential and Interesting Facts on Bow Hair
High Notes: Getting to Know Your Horsehair
Joule - Carbon bow for electric violins, violas and cellos
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Madison Academy of Music Singapore - Did you know that the bow hair is made of horsehair? A single bow will use between 160 to 180 individual hairs. No horses are killed
The Bowed string instruments: List of Musical Instruments in the Bowed string instruments Family
The bowed string
The Versatile History of Horsehair
Australian Fiddle Network