The calculus of observations; a treatise on numerical mathematics/
by E. T. Whittaker and G. Robinson.
- 3d ed.
- London: Blackie & Son, [1940].
- xvi, 395 p.: illus., 3 forms., 23 cm.
"First print 1924 ... Seventh impression (third edition) 1940." "Answers to examples": p. 383-386.