IMS Measures Progress. Montessori Observer, 2(7):1, 4, October, 1981.
bibtex   
@article{noauthor_ims_1981-2,
	title = {{IMS} {Measures} {Progress}},
	volume = {2},
	language = {eng},
	number = {7},
	journal = {Montessori Observer},
	month = oct,
	year = {1981},
	pages = {1, 4}
}

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