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Vienna Symphonic Library. (2002). History. In Vienna Symphonic Library . Retrieved May 24, 2015, from https://www.vsl.co.at/en/Bass_clarinet/History
Bass Clarinet. (2015). N.p.: Wikipedia. Retrieved from http://en.wikipedia.org/wiki/Bass_clarinet
Vienna Symphonic Library. (2002). History. In Vienna Symphonic Library . Retrieved May 24, 2015, from https://www.vsl.co.at/en/Bass_clarinet/History
Bass Clarinet. (2015). N.p.: Wikipedia. Retrieved from http://en.wikipedia.org/wiki/Bass_clarinet