Canadian Plant Disease Survey. v.50, 1970
Seaman, W.L., ed.
Canadian Plant Disease Survey. v.50, 1970 edited by W.L. Seaman - Ontario Agriculture Canada 1970 - v.50, 146 p.; 26cm.
0008476X
Canadian Plant Disease Survey. v.50, 1970 edited by W.L. Seaman - Ontario Agriculture Canada 1970 - v.50, 146 p.; 26cm.
0008476X