Las aventuras de Tintin — Editorial Juventud
Issue: #15
Returning to the Castle of Moulinsart of his previous adventure, Tintin and Captain Haddock learn that Professor Calculus Silvestre has gone Syldavia. After meeting with him in the Balkan country discover that Calculus is working on a secret atomic research facility in the heart of the mountains of Zmylpathes. The teacher has been hired by the government to direct the construction syldavo an atomi...
Creators: Hergé
Characters: Colonel Boris, Doctor Patella, Baxter, Miller, Snowy, Nestor, Captain Haddock, Dupond, Dupont, Professor Calculus, Frank Wolff, Tintin