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<br />., <br />, <br />i <br />, <br />j <br />1 <br /> <br />I <br />j <br />1 <br />I <br />j <br />, <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />1 <br />i <br /> <br />.' <br /> <br />Ron Hogan and others demonstrated the use of the PG-2 stereo plotter <br />and associated electronic equipment used to run valley cross sections <br />and draw planimetric and topographic maps. <br /> <br />Rulon Christensen <br /> <br />'.',,'" <br /> <br />2 <br /> <br />............ r <br />