• 1 Wisconsin Historical Society Library

• 6 Journals, Magazines, Newspapers

• 4 Recreation
• 3 Playgrounds
• 2 Social aspects
• 1 Child development
• 1 Children
• 1 Psychological aspects

• 2 Playground and Recreation Association of America
• 1 Association for the Study of Play
• 1 Duncan, Margaret Carlisle, 1951-
• 1 National Recreation Association
• 1 Playground Association of America
• 1 Women's Action Alliance. Non-Sexist Child Development Project

• 6 English

• 2 United States

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