diff --git a/content/media/book-a4.pdf b/content/media/book-a4.pdf
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diff --git a/content/pages/criptolibretto.md b/content/pages/criptolibretto.md
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--- a/content/pages/criptolibretto.md
+++ b/content/pages/criptolibretto.md
@@ -13,14 +13,10 @@ compilare da sé una versione stampabile seguendo le istruzioni sul git.
 
 Per il sorgente e l'ultima versione, seguire il [git](https://git.abbiamoundominio.org/unit/criptolibretto)
 
-<!-- 
+[Criptolibretto Pdf da stampa pieghevole | 1 aprile 2019]({attach}/media/book-a5-signature.pdf)
 
-[Criptolibretto Pdf da stampa pieghevole | 24 gennaio 2019](https://unit.abbiamoundominio.org/criptolibretto/book-a5-signature.pdf)~~
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+[Criptolibretto Pdf | 1 aprile 2019]({attach}/media/book-a4.pdf)
 
-[Criptolibretto Pdf | 24 gennaio 2019](https://unit.abbiamoundominio.org/criptolibretto/book-a4.pdf)~~
-
-    SHA256(book-a4.pdf)= 84c059584de8bc98628ce22de0eb57af7d49afa692df974795f551c02ab42549
-
--->
+<!-- SHA256(book-a4.pdf)= 84c059584de8bc98628ce22de0eb57af7d49afa692df974795f551c02ab42549 -->