Trio Sonata (Score & Parts)-2CL/BCL (Click on the title for more information)
Composer: Harbison, John
Publisher: Associated Music Pubishers
Trio Sonata for two clarinets and bass clarinet
by John Harbison (b. 1938)
Harbison published two versions of his Trio Sonata; one for oboe, English horn, and bassoon, and the other for two clarinets and bass clarinet.
The Trio Sonata for oboe, English horn and bassoon can be found here: http://www.trevcomusic.com/products/amp-50482451-harbison-trio-sonata-sc-pts-ob-eh-bsn
To order the version for oboe, clarinet, and bassoon (Harbison notes that the sets are interchangeable for any trio combination), then you need to order both the version for oboe, English horn, and bassoon (at the above link) , as well as the version for two clarinets and bass clarinet (this title). If this is confusing, please call or email TrevCo-Varner Music for further clarification.