@PozzSka - I don't have a clue about making bone picks, but there is a column on tamburaland where Joe Kirin gives more info about it -
http://www.tamburaland.com/column/column.html (the May 31st, 2002 entry).
About majstor Cindric - I've never heard of him or anything about him... But I'm not that informed so maybe somebody else heard something about him, but as you probably noticed people are generally pretty uninterested in writing anything in English.
So, you're pretty much stuck with me.
Rajkovic is actually from Sremska Mitrovica, south of Novi Sad. If you're interested in geography and maps - here's a map of Vojvodina -
http://www.zolitas.co.yu/karta_vojvodine.jpg