The art of rapid computation and simplification of the science of numbers
Subtitle: by short, concise, rapid and reliable methods ...
By: by J.W. Harris
Publisher: J.W. Harris
Published: 1919
Place of publication: Winnipeg
Language: eng
Number of pages: 207
Subjects: Arithmetic; Ready-reckoners; Arithmétique; Barèmes
Notes: Errata slip laid in.