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Map Attributes
Longitude and Latitude
Remove constraint Map Attributes: Longitude and Latitude
Map Attributes
Written Note/Details
Remove constraint Map Attributes: Written Note/Details
Cultivation/Extraction
Crops
Remove constraint Cultivation/Extraction: Crops
Land Routes
Railway/Tramway
Remove constraint Land Routes: Railway/Tramway
Simple Location
Laos
Remove constraint Simple Location: Laos
Simple Location
Vietnam
Remove constraint Simple Location: Vietnam
Place of Publication
London
Remove constraint Place of Publication: London