Use of polyethylene oxide for improved drilling of coal measure rocks in underground mine void detection and exploration programs
By: P. J. Watson, P. A. Tuzinski and J. E. Pahlman.
Contributors: Tuzinski, P. A; Pahlman, J. E
Publisher: s.n
Published: 1991
Place of publication: S.l
Number of pages: 43
Notes: 13