00517nam a22001337a 4500008004100000040005500041080001500096245013400111260007000245300001000315490003100325650001300356653001400369230627b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a622.12bL6  aEstimation of upper bounds to rock slopes by analysis of existing slope data c/ Canada Centre for Mineral and Energy Technology   aCanada: bCanada Centre for Mineral and Energy Technology, c1976  a64p.   aMinerals Research Program   aScience   aMinerals