Diagram: Greater Dazhbog runestone

The Diagram: Greater Dazhbog runestone will allow you to craft Greater Dazhbog runestones. Following traders are selling this manuscript:
 * The Pellar
 * Keira Metz
 * Preacher in Electors' Square
 * Scoia'tael merchant in the forest outside Novigrad
 * Blacksmith in Arinbjorn
 * Gremist
 * Blacksmith in Svorlag