The dozen system
Subtitle: an easier method of arithmetic
By: [by] George S. Terry
Edition: 1st ed.
Publisher: Longmans Green
Published: 1941
Place of publication: London; New York
Language: eng
Number of pages: 63
Subjects: Numeration; Duodecimal system
Notes: Reproduced from type-written copy.

Paged by the dozen system.

"Duodecimal protractor reading .002 circle" and table laid in.