von Ihering, R., & Cockayne, A.H. 1909a The gum-tree scale.. Bulletin of the New Zealand Department of Agriculture, Division of Biology No. 13: 1-8.
Notes: Title inside is "Gum-tree blight and the natural enemy"; Eriococcus coriaceus.
von Ihering, R., & Cockayne, A.H. 1909a The gum-tree scale.. Bulletin of the New Zealand Department of Agriculture, Division of Biology No. 13: 1-8.
Notes: Title inside is "Gum-tree blight and the natural enemy"; Eriococcus coriaceus.