Extension supervision Part II- Criteria and performance
Collings, M.L.
Extension supervision Part II- Criteria and performance - Washington 1959 - 1-15 p. - United States Depatment of Agriculture, Federal Extension service. Circular No. 523 .
Extension supervision Part II- Criteria and performance - Washington 1959 - 1-15 p. - United States Depatment of Agriculture, Federal Extension service. Circular No. 523 .