21. These surgeries included the first repairs of the atrioventricular canal and tetralogy of Fallot. 22. This text is basically the " easy " short form of the Joseph tetralogy . 23. The Danaid tetralogy of Aeschylus undoubtedly draws its material from this particular literary work. 24. Similarly with " tetralogy " and the other terms for other numbers of works. 25. All 36 works of the nine tetralogies though may be cited with this template. 26. A reconstruction of Aeschylus'lost tetralogy . 27. When the next novel is completed, the books will form a kind of tetralogy . 28. The oldest manuscript for the seventh tetralogy is Codex Vindobonensis 54 . suppl . phil. 29. Click again and an essay appears, tracing the motif's evolution through the tetralogy . 30. In 2001, Tom Markus directed an adaptation of the tetralogy at the Colorado Shakespeare Festival.