"1980 apple spray program costs."; "West Virginia University. Cooperative Extension Service."; "Spraying and dusting in agriculture--West Virginia--Costs.", "Apples--Diseases and pests--Control--West Virginia--Costs."; "West Virginia University. Cooperative Extension Service."; "1980"; "

Mimeograph of typescript. West Virginia University Cooperative Extension Service memorandum to West Virginia fruit grower attached.

"; ""; "P19000"; "pec"; "Apples--Diseases and pests--Control--West Virginia--Costs.", "Spraying and dusting in agriculture--West Virginia--Costs."; "14256"; .