Tables Showing Difference of Level in Feet, Corresponding to a Given Angle When the Distance Is Read in Metres or Feet, and for Horizontal Reductions, for Use With Stadia (Classic Reprint) Ockerson, John Augustus Heftet / 2018 / Engelsk
Tables Showing Difference of Level in Feet, Corresponding to a Given Angle When the Distance Is Read in Metres or Feet, and for Horizontal Reductions, for Use With Stadia (Classic Reprint) Ockerson, John Augustus Innbundet / 2018 / Engelsk
