"southwell, p h. "
engineering in agriculture: / p.h. southwell - 1 ed. - uk : temple press 1955. - "xii, 259p.; 22 cm."
S675 / .S67 1955
engineering in agriculture: / p.h. southwell - 1 ed. - uk : temple press 1955. - "xii, 259p.; 22 cm."
S675 / .S67 1955