Elements of plants protection
Pyenson, L.L.
Elements of plants protection by L.L. Pyenson - New York John Wiley and Sons 1951 - 538 p.
Plant Protection
632 / P 995 E
Elements of plants protection by L.L. Pyenson - New York John Wiley and Sons 1951 - 538 p.
Plant Protection
632 / P 995 E