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1 <br />~~ <br />i <br />1 <br />i <br />i 1 <br />1 <br />1 <br />t <br />~~I II~II~II~II~~ I~~ <br />3 - ~"~~ <br />ESTIMATING WEAK ROCK STRENGTH <br />BY <br />ANDRE'~ MAC G ROBERTSON <br />PRESIDENT <br />STEEPEN ROBERTSON AND KIRSTEN <br />SUITE 801 - 1030 WEST GEORGIA STREET, <br />VANCOUVER BC <br />Y6E 2Y3 <br />