Correspondence, news clippings, manuscripts, and reports related primarily to the development and usage of the Klamath River Basin in the mid-20th century, created and compiled by consultant Frank L. Lathrop. Lathrop was born on April 3, 1882. He was a licensed real estate broker and a "specialist in fact finding." He resided in Yreka, California, and took interest in public lands and water-supply.
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