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<br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />Adult 25 lb. (11 kg) Colorado squawfish from the Green River, ca. 1928. <br />(Photo courtesy of the National Park Service, Dinosaur National Momument.) <br /> <br />. <br /> <br />. <br /> <br />FRONTISPIECE <br /> <br />i i <br /> <br />. <br />