http://pec.lib.wvu.edu/record/P27661931Marketing apples grown in the Cumberland-Shenandoah region of Pennsylvania, Virginia, and West Virginia. Serial issue. Issued as: United States. Department of Agriculture. <em>Technical bulletin</em>, no.234 (1931:Mar.). Swinson, Carl R. (Carl Robert), 1891-Apples--Marketing--Pennsylvania.Apples--Marketing--Virginia.Apples--Marketing--West Virginia.14256