Cell phones and sun shadows:
MADDEN, Sean P.
Cell phones and sun shadows: Exploring the equation of time Sean P.Madden - Reston The national council of teachers of mathematics 2010 - p.356 - 372 - Mathematics teacher: Vol. 104, No.5 .
00255769
Cell phones and sun shadows: Exploring the equation of time Sean P.Madden - Reston The national council of teachers of mathematics 2010 - p.356 - 372 - Mathematics teacher: Vol. 104, No.5 .
00255769