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Source: 
p. 5, b. 68-85
p. 1, b. 1-18
p. 2, b. 19-35
p. 3, b. 36-51
p. 4, b. 52-67
p. 5, b. 68-85
p. 6, b. 86-103
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  b. 75

None of the sources has the  lowering a1 into a1. In JC and EF, in which the first two demisemiquaver groups in this bar are written with the use of an octave sign (overseen in JC); however, one cannot even talk about an inaccuracy here, as the  before the note of this pitch is already in the 2nd group of demisemiquavers. 

Compare the passage in the sources»

category imprint: Interpretations within context

issues: Accidentals in different octaves, Omission of current key accidentals

notation: Pitch