Conserving human and natural resources : oral history transcript / Athur C. Ringland ; tape recorded interview conducted by Amelia R. Fry, Edith Mezirow, Fern Ingersoll and Thelma Dreis in 1966-1968. Regional Oral History Office, the Bancroft Library, University of California, Berkeley, California, 1970 : and related material, 1966-1970.
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