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The Mentors' Manual : a Guide for Leaders in Boys' Work, Parents, Teachers, Ministers and All who are Interested in the Welfare of Canadian Boyhood

Percy R. (Percy Roy) Hayward

出版	Committee on Canadian standard efficiency training of the National council of the Young men's Christian Association of Canada, 1919
URL	http://books.google.com.hk/books?id=kF_OQAAACAAJ&hl=&source=gbs_api