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Dyscalculia in Schools: What it is and What You Can Do. First & Best in Education Ltd. ISBN 978-1-86083-614-5. OCLC 54991398. Butterworth B, Yeo D (2004). Dyscalculia Guidance: Helping Pupils with Specific Learning Difficulties in Maths. London: NferNelson. ISBN 978-0-7087-1152-1. OCLC 56974589. Campbell JI (2004). Handbook of Mathematical ...
PDFtk (short for PDF Toolkit) is a toolkit for manipulating Portable Document Format (PDF) documents. [3] [4] It runs on Linux, Windows and macOS. [5] It comes in three versions: PDFtk Server (open-source command-line tool), PDFtk Free and PDFtk Pro (proprietary paid). [2] It is able to concatenate, shuffle, split and rotate PDF files.
David Allen Sibley (born October 22, 1961, in Plattsburgh, New York) is an American ornithologist.He is the author and illustrator of The Sibley Guide to Birds, which rivals Roger Tory Peterson's as the most comprehensive guides for North American ornithological field identification.
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This isn't dyscalculia, this describes dyslexia: dyslexia doesn't "become" dyscalculia because the symbols being misinterpreted represent numbers rather than sounds - problems with alphanumeric recognition are dyslexia. Dyscalculia is an inability to compute numbers, pure and simple: for the dyscalculic, 4+7 is as much mental arithmetic as 346÷13.
Bird Neighbors (1897) by Neltje Blanchan was an early birding book which sold over 250,000 copies. [1] It was illustrated with color photographs of stuffed birds. [2] The Field Guide to the Birds by Roger Tory Peterson is regarded as the key birding book of the 20th century, due to its impact on the development and popularisation of birding.
The Sibley Guide to Birds is a reference work and field guide for the birds found in the continental United States and Canada. It is written and illustrated by ornithologist David Allen Sibley . The book provides details on 810 species of birds, with information about identification, life history, vocalizations, and geographic distribution.
The Helm Identification Guides are a series of books that identify groups of birds.The series include two types of guides, those that are: Taxonomic, dealing with a particular family of birds on a worldwide scale—most early Helm Guides were this type, as well as many more-recent ones, although some later books deal with identification of such groups on a regional scale only (e.g., The Gulls ...