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Source: 
p. 1, b. 1-16
p. 1, b. 1-16
p. 2, b. 17-34
p. 3, b. 35-53
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A - Autograph
FE - French edition
FE1 - First French edition
FE2 - Corrected impression of FE1
FED - Dubois copy
FEJ - Jędrzejewicz copy
FES - Stirling copy
GE - German edition
GE1 - First German edition
GE1a - Corrected impression of GE1
GE2 - Second German edition
GE3 - Third German edition
GE4 - Fourth German edition
GE5 - Fifth German edition
EE - English edition
EE2 - First English edition
EE3 - Corrected impression of EE2
EE4 - Revised impression of EE3
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A - Autograph
FE - French edition
FE1 - First French edition
FE2 - Corrected impression of FE1
FED - Dubois copy
FEJ - Jędrzejewicz copy
FES - Stirling copy
GE - German edition
GE1 - First German edition
GE1a - Corrected impression of GE1
GE2 - Second German edition
GE3 - Third German edition
GE4 - Fourth German edition
GE5 - Fifth German edition
EE - English edition
EE2 - First English edition
EE3 - Corrected impression of EE2
EE4 - Revised impression of EE3
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  b. 12

In this context the missing  before d must be considered as Chopin's oversight (in the remaining two analogous bars the sign is both in A and the remaining sources).

Compare the passage in the sources»

category imprint: Differences between sources

issues: EE revisions, GE revisions, Cautionary accidentals

notation: Pitch

Missing markers on sources: A, FE1, FE2, FED, FEJ, FES, GE1a, GE2, GE3, GE4, GE5, EE2, EE3, EE4, GE1