Impromptu, H.166 (Martinů, Bohuslav)
This work is likely not in the public domain in the US (due to first publication with the required notice after 1922, plus renewal or "restoration" under the GATT/TRIPS amendments), nor in the EU and those countries where the copyright term is life+70 years. However, it is public domain in Canada (where IMSLP is hosted) and in other countries (China, Japan, S. Korea) where the copyright term is life+50 years.
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Scores and Parts
Praha: Hudební Matice, 1934. Plate H.M. 589.
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