Agricultural extension system of the United States
Smith, C.B., Wilson, M.C.
Agricultural extension system of the United States by C.B. Smith and M.C. Wilson - New York John Wiley and Sons 1930 - 402 p.
Agricultural Extension
63(071.7)(73) / S 644 A
Agricultural extension system of the United States by C.B. Smith and M.C. Wilson - New York John Wiley and Sons 1930 - 402 p.
Agricultural Extension
63(071.7)(73) / S 644 A