Factors Influencing the Yield of Apples in the Cumberland-Shenandoah Region of Pennsylvania, Virginia, and West Virginia

by Conde Balcom McCullogh, Cortes Gilbert Randell, Freeman Albert Weiss, Harold Morrison, John Beardsley Sieglinger, Leon Howard Worthley, Oliver Irvin Snapp, William Robin Thompson, Charles Harold Alden, Donald John Caffrey, Harry Lamont Parker, Philip Brierley · 1927