@book{ladel_german_2018,
	address = {Umea, Schweden},
	title = {German {Prospective} {Teachers}’ {Understanding} of place value},
	author = {Ladel, Silke and Kortenkamp, Ulrich and Goral, Johanna and Thanheiser, Eva},
	year = {2018},
	note = {Publication Title: PME 42},
}

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