Clemson, D., & Clemson, W. (1994). Mathematics in the early years. Routledge.
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Chicago-čujuhus (17. p.)
Clemson, David, juo Wendy Clemson. Mathematics in the Early Years. London ; New York: Routledge, 1994.
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MLA-čujuhus (9. p.)
Clemson, David, juo Wendy Clemson. Mathematics in the Early Years. Routledge, 1994.
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