The cost of producing apples in Hood River Valley : a detailed study, made in 1915, of the current-cost factors involved in the maintenance of orchards and the handling of the crop on 54 farms - Thomson, S. M.,; Miller, G. H. (George Harvey), (Washington, D.C, U.S. Dept. of Agriculture, 1917, 1917)
https://www.biodiversitylibrary.org/bibliography/64490
Keywords: Apples|Hood River; East Fork Valley|Oregon