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-rw-r--r--doc/source/user/how-to-io.rst3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/source/user/how-to-io.rst b/doc/source/user/how-to-io.rst
index 1d4ded159..ca9fc41f0 100644
--- a/doc/source/user/how-to-io.rst
+++ b/doc/source/user/how-to-io.rst
@@ -250,7 +250,8 @@ The ``.wav`` file header as a NumPy structured dtype::
This ``.wav`` example is for illustration; to read a ``.wav`` file in real
life, use Python's built-in module :mod:`wave`.
-Credit: Pauli Virtanen, :ref:`advanced_numpy`.
+(Adapted from Pauli Virtanen, :ref:`advanced_numpy`, licensed
+under `CC BY 4.0 <https://creativecommons.org/licenses/by/4.0/>`_.)
.. _how-to-io-large-arrays: