http://pec.lib.wvu.edu/record/P166741953-1956Barberry Eradication Project program annual report, calendar year ... Serial. Printed Ephemera Collection has: 1953, 1955, 1956. Title varies slightly. "U.S. Department of Agriculture, Bureau of Entomology and Plant Quarantine, Region V, in cooperation with State, County, and local agencies." Barberries--Control--United States.14256