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<br />. <br /> <br />001398 <br /> <br />. <br /> <br />. <br /> <br />.. <br /> <br />Preliminary map of the conterminous United States showing depth <br />to and quality of the shallowest ground water containing more <br />than 1,000 parts per million dissolved solids, by J, H. Feth and <br />others is available from the Public Inquiries Office in the <br />Denver Federal Building or the Map Distribution Office in <br />Building 25 at the Denver Federal Center. The price is $1.25. <br /> <br />A primer on water quality by H, A, Swenson and H. L. Baldwin, <br />1965, 27 pages. The price is 30 cents. <br /> <br />A paper by R. T. Hurr and D. B. Richards, "Ground-Water Engineering <br />of the Straight Creek Tunnel (Pilot Bore), Colorado" was pre- <br />sented at the 1965 National Convention of the Association of <br />Engineering Geologists at Denver in October, <br /> <br />A paper by J, E, Moore and L. A. Wood, "Analog-Model Evaluation <br />of the Arkansas River Valley in Eastern Colorado" waS presented <br />at the 1965 Annual Meeting of the Geological Society of America <br />in Kansas City, Missouri, in November. <br /> <br />The folder "Water Resources Investigations in Colorado" first <br />issued in 1962 was revised in 1965 and is available free upon <br />application to the U. S, Geological Survey~ <br /> <br />3 <br />