| BSAVA Manual of Small Animal Ophthalmology | The History of British Roadsigns, Department for Transport, 2nd Edition, 1999• BSAVA Manual of Small Animal Ophthalmology |
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| David Lydford, of , said: Cat's eyes sometimes work loose, but I have never come across an accident like this in my 28 years with the police | Fuller Up, the Dead Musician Directory |
British patent 289619 7 April 1927• BSAVA Manual of Small Animal Ophthalmology.
21| BSAVA Manual of Small Animal Ophthalmology | Osborne, Alistair 1 April 2002 |
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