Update README.md

README.md

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 # POPP Dataset
 
+The POPP dataset includes French civil census from Paris from the early 20th century.
+
 ## Table of Contents
 - [POPP Dataset](#popp-dataset)
   - [Table of Contents](#table-of-contents)
@@ -35,7 +37,7 @@ dataset_info:
 ## Dataset Description
 
 - **Homepage:** [POPP](https://popp.hypotheses.org/)
-- **Paper:** [Paper](https://link.springer.com/chapter/10.1007/978-3-031-06555-2_10)
+- **Paper:** [Recognition and Information Extraction in Historical Handwritten Tables: Toward Understanding Early 20th Century Paris Census](https://link.springer.com/chapter/10.1007/978-3-031-06555-2_10)
 - **Point of Contact:** [TEKLIA](https://teklia.com)
 
 ### Languages