books.google.co.uk - "Of all the literature I use while preparing field guides for the Food and Agriculture Organization of the United Nations, Nelson's Fishes of the World is, by far, the one I refer to most often. [This] book is a standard reference . . . I continue to use it extensively in the ichthyology courses I teach,...http://books.google.co.uk/books/about/Fishes_of_the_World.html?id=exTV-GLnCB4C&utm_source=gb-gplus-shareFishes of the World