--- Document.title
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-Cryptography
--- Document.authors
+++ Document.authors
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-David R. Kohel
--- Document.description
+++ Document.description
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-A book about cryptography
--- Document.url_concatenation
+++ Document.url_concatenation
@@ -1,49 +0,0 @@
-http://www.sagemath.org/files/kohel-book-2008.pdf