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Image
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4
Non-Commercial Use
4
Category
Mathematics
4
Object type
teaching aids (mathematical)
4
Maker
Cosmiroid England; Perry, E. S.
1
Edmund S Perry
1
Montessori Centre International Limited
1
Place of origin
England
2
England, United Kingdom
1
London
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London; England
1
Date
From
To
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Diene's multi-base arithmetic blocks, 1960-1965.
1960-1965
Number balance 1980-1985
1980-1985
Introduction to Decimal Quantity', teaching aid, 2000.
2000
Centicubes with board, 1972-1975.
1972-1975