@incollection{Jeffrey13, author = {R. G. Jeffrey and Z. Chen and K. W. Mills and S. Pegg}, title = {Monitoring and Measuring Hydraulic Fracturing Growth During Preconditioning of a Roof Rock over a Coal Longwall Panel}, booktitle = {Effective and Sustainable Hydraulic Fracturing}, publisher = {IntechOpen}, address = {Rijeka}, year = {2013}, editor = {Andrew P. Bunger and John McLennan and Rob Jeffrey}, chapter = {45}, doi = {10.5772/56325}, url = {https://doi.org/10.5772/56325} }