Modern farming /
Roberts, Roy W., 1898-
Modern farming / Roy W. Roberts. - 2nd ed. - Chicago : Lippincott, 1956. - 600 p. : ill. ; 22 cm.
Agriculture ----United States.----
630
Modern farming / Roy W. Roberts. - 2nd ed. - Chicago : Lippincott, 1956. - 600 p. : ill. ; 22 cm.
Agriculture ----United States.----
630