Bear, Firman E. ...[et al.].
Hunger signs in crops : a symposium / Firman E. Bear ...[et al.]. - Rev ed. - Washington D.C. : The American society of Agronomy, c 1949. - xvi, 390 p. : ill. ; 26 cm.
Includes index.
92 92
Plant injuries, diseases, pests.
632 / A35h
Hunger signs in crops : a symposium / Firman E. Bear ...[et al.]. - Rev ed. - Washington D.C. : The American society of Agronomy, c 1949. - xvi, 390 p. : ill. ; 26 cm.
Includes index.
92 92
Plant injuries, diseases, pests.
632 / A35h