See also:

• Business: Publishing and Printing: Publishing: Academic and Technical  (149)
• Reference  (59,159)
• Reference: Dictionaries: By Subject  (514)

	Physics and Science Reference by PhysLINK.com   - Includes physical constants, online unit conversions, periodic table of elements, exact time, fundamental physical formulae and equations.
	Astronomical Constants from NASA - Contains astronomical/space constants and equations.
	Beta-Theta - Gives general defintions, background and examples from the science fields of biology, physics, chemistry, math, and history. Includes forum boards.
	CalcTool - Directory of simply-presented javascript calculators and equations for making common calculations. Provides quick, simple online calculation and unit conversion tools.
	The Constants and Equations Pages - Expands reference resources for science, maths, and astronomy.
	DOE Community - Searchable database for reports that are generated by federally funded projects.
	Eformulae.com - Online resource providing engineering, science, math, physics and chemistry formulae for reference.
	RefScout - A weekly, scientific reference mailing service.

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