Regular Series 1:20k (Chasseaud Collection)
Pages
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- [Ypres Salient]
- Series Number Id: GSGS 2742; Sheet number: 20 SW; Edition number: 1, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC04; envelope_number: 88, Manuscript on cover: C. N. Wright.
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- [Yser River Region, Belgium : 3rd Battle of Ypres]
- Series Number Id: GSGS 2742; Sheet number: 20 SW; Edition number: 3a, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC07; envelope_number: 190
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- [Yser River Region, Belgium : 3rd Battle of Ypres]
- Series Number Id: GSGS 2742; Sheet number: 20 SW; Edition number: 4a, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC07; envelope_number: 191
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- [Yser River Region, Belgium : 3rd Battle of Ypres]
- Series Number Id: GSGS 2742; Sheet number: 20 SW; Edition number: 4a, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC07; envelope_number: 192
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- [Yser River Region, Belgium : 3rd Battle of Ypres]
- Series Number Id: GSGS 2742; Sheet number: 20 SW; Edition number: 5a, Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC07; envelope_number: 193