The calculus of observations; a treatise on numerical mathematics, by E.T. Whittaker ... and G. Robinson ... Whittaker, E. T. (Edmund Taylor), 1873-1956. Robinson, George, joint author. Numerical calculations. QA297 .W5 1924 517 WHC London : Blackie and Son limited, 1924. 1924. 1924 Text xvi, 395 p. : eng