Editing Spherical coordinate system (section)

== Bibliography ==
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* {{cite book |author=Moon P, Spencer DE |year=1988 |chapter=Spherical Coordinates (r, θ, ψ) |title=Field Theory Handbook, Including Coordinate Systems, Differential Equations, and Their Solutions |edition=corrected 2nd ed., 3rd print |publisher=Springer-Verlag |location=New York |pages=24–27 (Table 1.05) |isbn=978-0-387-18430-2}}
* {{cite book |author=Duffett-Smith P, Zwart J |year=2011 |title=Practical Astronomy with your Calculator or Spreadsheet, 4th Edition |publisher=Cambridge University Press |location=New York |pages=34 |isbn=978-0521146548}}