Bibliographies 32
Periodic Table 72
Science Dictionaries 106
Science Libraries 116
Standards 365
Units of Measurement 70
Biology and Genetics 33
Math 38
Acoustic Material Properties 4
Chemical Databases 60
Materials Safety Data Sheets 14
| | Academic and Technical - Publishing, Publishing and Printing, Business 149
Reference 59,141
By Subject - Dictionaries, Reference 513
 Physics and Science Reference by PhysLINK.comPhysics and Science Reference by PhysLINK.com
 
Includes physical constants, online unit conversions, periodic table of elements, exact time, fundamental physical formulae and equations.
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Astronomical Constants from NASAAstronomical Constants from NASA
 Contains astronomical/space constants and equations.
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Beta-ThetaBeta-Theta
 Gives general defintions, background and examples from the science fields of biology, physics, chemistry, math, and history. Includes forum boards.
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CalcToolCalcTool
 Directory of simply-presented javascript calculators and equations for making common calculations. Provides quick, simple online calculation and unit conversion tools.
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The Constants and Equations PagesThe Constants and Equations Pages
 Expands reference resources for science, maths, and astronomy.
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DOE CommunityDOE Community
 Searchable database for reports that are generated by federally funded projects.
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Eformulae.comEformulae.com
 Online resource providing engineering, science, math, physics and chemistry formulae for reference.
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RefScoutRefScout
 A weekly, scientific reference mailing service.
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Science and Engineering EncyclopediaScience and Engineering Encyclopedia
 Descriptions, equations, calculators, conversions and material data for engineering, mathematics, physics and chemistry.
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