New mental arithmetic
By: by John Duncan.
Contributors: Cline, Helen.
Edition: (1st ed.), 12thand revised impression / revised by Helen Cline.
Publisher: Collins
Published: 1970
Place of publication: London
Language: eng
Number of pages: 127
Subjects: Arithmetic, Mental.
Other titles: Mental arithmetic.
Notes: Originally published (B54-15072) as 'Mental arithmetic'. 1954.