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307. Information series. 79. How regional plan services operate. Sl.

309. [Soil survey reports] series 1938. 14. Soil survey, Akron area, Colo. [with list of literature cited]; by E. W. Knoble, Lindsey A. Brown, Dale Hodgell, Clinton Bourne, E. L. McPherron, F. M. Paxton, Clarles A. Black, Irving Brown, James Jay, W. E. Haines, and Frank Viets.