Direct Steerable Pipe ThrustingJon Robison, Jeff Scholl, Andrew Sparks, Joachim Engelhardt, Andrew Finney · First published 2023Open the Tome
Proceedings of 10th International Kimberlite ConferenceD Graham Pearson, Herman S Grütter, Jeff W Harris, Bruce A Kjarsgaard, Hugh O’Brien, N V Chalapathi Rao, Steven Sparks · First published 2013Open the Tome
