TY  - BOOK
AU  - Whittaker, E.T.
AU  - Robinson, G.
TI  - The calculus of Observations : A treatise on Numerical mathematics
U1  - 515.1 21st ed.
PY  - 1926///
CY  - Bombay
PB  - Blackie and son, Limited 
KW  - Calculus
KW  - central difference formulae
KW  - Numerical mathematics
ER  -