Economic and efficiency implications of selected tractors in Washington State
By: by James Edward Durfey.
Published: 1990
Language: eng
Number of pages: 126
Subjects: Agriculture -- Study and teaching -- Washington (State); Farm tractors -- Economic aspects.
Notes: Typescript.

Thesis (M.A.C.Ed.)--Washington State University, 1990.

Includes bibliographical references (leaves 63-66).

WSU:"Department of Adult and Youth Education."