• Bookyards.com » Library to the world
  Bookyards is your online public library to the world with a large selection of free digital books, ebooks, and journals, plus the largest collection of reference materials and educational resources for your educational and personal interests
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• EquationSheet.com - Create a personal Equation Sheet from a large database of science and math equations including constants...
  Create a personal Equation Sheet from a large database of science and math equations including constants, symbols, and SI units. Large equation database, equations available in LaTeX and MathML, PNG image, and MathType 5.0 format, scientific and mathematical constants database, physical science SI units database, interactive unit conversions, especially for students and teachers
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