The current Cosmology Calculator version is here         ---> http://www.davidcook.com/CosmoCalc.htm





            The Reciprocal Difference Formula is here                     ---> http://www.davidcook.com/Reciprocal_Difference_Formula.pdf





            For questions regarding this site, please contact (email) this guy: Ralph Wilkerson (ralphwilkerson@hotmail.com)