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BioImages: The Virtual Field-Guide (UK)
Viking
Part of the Penguin Group
Publications
| Porter, J., 1997 |
The Colour Identification Guide to Caterpillars of the British Isles |
| Rose, F., 1989 |
Colour Identification Guide to Grasses, Sedges, Rushes and Ferns of the British Isles and north-western Europe |
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