%0 Journal Article %T Trends of Research on New Designs of Diamond Drilling Bits Made by Volgaburmash %A Nekrasov, I. %A Bogomolov, R. %J Chemical and Petroleum Engineering %V 41 %N 4 %P 137-138 %@ 0009-2355 %D 2005-06-23 %I Kluwer Academic Publishers-Consultants Bureau %~ DeepDyve