"Hybrid corn."; "West Virginia Cooperative Crop Reporting Service."; "Hybrid corn--United States--Statistics--Periodicals.", "Hybrid corn--West Virginia--Statistics--Periodicals."; "West Virginia Cooperative Crop Reporting Service."; "1956-1960"; "

Serial. Printed Ephemera Collection has: 1956:July 17, 1957:July 16, 1958:July 17, 1959:July 16, 1960:July 18.

"; ""; "P20030"; "pec"; "Hybrid corn--United States--Statistics--Periodicals.", "Hybrid corn--West Virginia--Statistics--Periodicals."; "14256"; .