✦ LIBER ✦

FACTORS AFFECTING THE SPREAD OF APHID-BORNE VIRUSES IN POTATO IN EASTERN SCOTLAND : III. EFFECTS OF PLANTING DATE, ROGUING AND AGE OF CROP ON THE SPREAD OF POTATO LEAF-ROLL AND Y VIRUSES

✍ Scribed by C. H. CADMAN; J. CHAMBERS

No coin nor oath required. For personal study only.

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