Helping one - hellping all. Joosten, A. M. Communications: Journal of the Association Montessori Internationale, 1970. Number: 2/3
bibtex   
@article{joosten_helping_1970,
	title = {Helping one - hellping all},
	number = {2/3},
	journal = {Communications: Journal of the Association Montessori Internationale},
	author = {Joosten, A. M.},
	year = {1970},
	note = {Number: 2/3}
}
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