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-rw-r--r--one/six.scm4
1 files changed, 4 insertions, 0 deletions
diff --git a/one/six.scm b/one/six.scm
index ab58664..e60d1ee 100644
--- a/one/six.scm
+++ b/one/six.scm
@@ -1,3 +1,7 @@
+;;; Under Creative Commons Attribution-ShareAlike 4.0
+;;; International. See
+;;; <https://creativecommons.org/licenses/by-sa/4.0/>.
+
(define-module (one six)
#:export (sqrt-sicp sqrt-nif square good-enough? new-if improve))