JC
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Neither in PE, which certainly recreates the layout of [A] accurately, nor in JC the reprise of the main section of the Polonaise is explicitly marked. The description Trio (bar 52) given to the section ending here indicated it sufficiently due to the generally known dance form.
In EF, all performed sections are written out entirely, therefore, there is no need to insert the hints clarifying the piece's form.
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category imprint: Differences between sources
notation: Shorthand & other