diff --git a/Lessons/L02_TheArgoData/Chapter10_TheArgoData_intro.ipynb b/Lessons/L02_TheArgoData/Chapter10_TheArgoData_intro.ipynb
index 2cf76da..ec6e3dd 100644
--- a/Lessons/L02_TheArgoData/Chapter10_TheArgoData_intro.ipynb
+++ b/Lessons/L02_TheArgoData/Chapter10_TheArgoData_intro.ipynb
@@ -92,7 +92,7 @@
     "\n",
     "* By processing date: The last processed data organized by processing day, with access to the last 12 months.\n",
     "\n",
-    "At the early stage of the Argo program, and due to the huge amount of data that was foreseen  Argo would create, it was decided that netCDF would be the official file format for the Argo data. Hence, before explaining how to [acces Argo data by float](https://euroargodev.github.io/argoonlineschool/Lessons/L03_UsingArgoData/Chapter24_ArgoDatabyFloat_ArgoPy.html) or [by date](https://euroargodev.github.io/argoonlineschool/Lessons/L03_UsingArgoData/Chapter30_ArgoDatabyDate_Intro.html) it is necessary to make a short introduction to the properties of this data format, and how to read files in **netCDF**.\n",
+    "At the early stage of the Argo program, and due to the huge amount of data that was foreseen  Argo would create, it was decided that netCDF would be the official file format for the Argo data. Hence, before explaining how to [acces Argo data by float](https://euroargodev.github.io/argoonlineschool/Lessons/L03_UsingArgoData/Chapter20_ArgoDatabyFloat_Intro.html) or [by date](https://euroargodev.github.io/argoonlineschool/Lessons/L03_UsingArgoData/Chapter30_ArgoDatabyDate_Intro.html) it is necessary to make a short introduction to the properties of this data format, and how to read files in **netCDF**.\n",
     "\n"
    ]
   }