Woodhead, C.E. 1958: A survey of collar rot and root rot of Cox's Orange Pippin and other apple varieties in Nelson and Marlborough. New Zealand Journal of Agricultural Research 1: 462-476.
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| Woodhead, C.E. 1958: A survey of collar rot and root rot of Cox's Orange Pippin and other apple varieties in Nelson and Marlborough. New Zealand Journal of Agricultural Research 1: 462-476. |