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Why 250,000 Children Quit School
Luther Halsey Gulick
其他書名
The Yearly Army that Drops Out of Line--standards Too High and Teaching Too Dull
出版Department of Child Hygiene, Russell Sage Foundation, 1910
URLhttp://books.google.com.hk/books?id=mN8nAAAAYAAJ&hl=&source=gbs_api