Whittaker, E. T.  1873-1956. <br/><br/>
The calculus of observations :  a treatise on numerical mathematics /  
by E. T. Whittaker and G. Robinson. 
 - 4th ed. 
 - London and Glasgow :  Blackie & Son,   [1944 [reprint 1960]  
 - xvi, 395 p. :  ill. ;   23 cm.  
<br/><br/> "Answers to examples": p. 385-388.  "First print 1924... ninth impression (4th edition) 1944". 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Numerical calculations.
<br/><br/><label>Dewey Class. No.: </label>518  / WHC