Base ten block (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Base ten block" in Simple English language version.

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archive.org (Global: 6^th place; Simple English: 4^th place)

Dienes, Zoltán Pál (1960). Building Up Mathematics. London: Hutchinson.
Dienes, Zoltán Pál (1963). An Experimental Study of Mathematics Learning. London: Hutchinson.
Stern, Catherine (1949). Children Discover Arithmetic. Harper & Row. (Revised edition, 1971, with Margaret Stern.)

doi.org (Global: 2^nd place; Simple English: 3^rd place)

Kim, Rina; Albert, Lillie R. (2014). "The history of base-ten-blocks: Why and who made base-ten-blocks". Mediterranean Journal of Social Sciences. 5 (9): 356–365. doi:10.5901/mjss.2014.v5n9p356.