Add sections to the bookbuilder: Letter of América Scarfó to Émile Armand (América Scarfó, Émile Armand)

 

With complex structures, e.g., a chapter with subsections, selecting only the chapter is likely to select only the chapter's title, so probably you want to select the chapter and all its subsections.

The text structure is shown below.

 
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Letter of América Scarfó to Émile Armand
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