UNITED STATES ARMED FORCES INSTITUTE, MADISON, WIS.
End-of-course test in Crop management and soil conservation. Course no.EM858. By members of the examinations staff, Ralph W. Tyler, director.
UNITED STATES ARMED FORCES INSTITUTE, MADISON, WIS. End-of-course test in Crop management and soil conservation. Course no.EM858. By members of the examinations staff, Ralph W. Tyler, director. © 24Nov44; AA480398. Educational Testing Service (PWH); 8May72; R528691.
Educational Testing Service|PWH