diff --git a/ml1/2_0_0_Intro_ML.ipynb b/ml1/2_0_0_Intro_ML.ipynb
index 2a05af5..56b44fe 100644
--- a/ml1/2_0_0_Intro_ML.ipynb
+++ b/ml1/2_0_0_Intro_ML.ipynb
@@ -71,7 +71,6 @@
    "source": [
     "* [Scikit-learn web page](http://scikit-learn.org/stable/)\n",
     "* [Scikit-learn videos](http://blog.kaggle.com/author/kevin-markham/) and [notebooks](https://github.com/justmarkham/scikit-learn-videos) by Kevin Marham\n",
-    "* [scikit-learn : Machine Learning Simplified](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), Raúl Garreta; Guillermo Moncecchi, Packt Publishing, 2017.\n",
     "* [Python Machine Learning](https://learning.oreilly.com/library/view/python-machine-learning/9781789955750/), Sebastian Raschka, Packt Publishing, 2019."
    ]
   },