diff --git a/README.md b/README.md
index 24ae913..cf579d8 100644
--- a/README.md
+++ b/README.md
@@ -12,10 +12,10 @@ Continually updated Data Science IPython Notebooks.
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-Notebooks include: Spark, Hadoop MapReduce, HDFS, AWS, Kaggle, scikit-learn, matplotlib, pandas, NumPy, SciPy, Python, and various command lines.
-
 This repo is a collection of IPython Notebooks I reference while working with data.
 
+Although I created most notebooks, some notebooks I reference were created by other authors who are credited by naming the authors and/or providing a link to the source.
+
 ## Index
 
 * [spark](#spark)