Primary mathematics : lines of development /
Debboys, Mary.
Primary mathematics : lines of development / Mary Deboys. - Galway Park : The Blackstaff press, 1979. - 332 p. : ill. ; 20 cm.
Include bibliography.
0856401943
Mathematics--Study and teaching (Elementary) --Great Britain.
510.DEB
Primary mathematics : lines of development / Mary Deboys. - Galway Park : The Blackstaff press, 1979. - 332 p. : ill. ; 20 cm.
Include bibliography.
0856401943
Mathematics--Study and teaching (Elementary) --Great Britain.
510.DEB