秦关根, 章锡仁译, 洪水平, 余俊雄改编

中國少年兒童出版社 1983.3 北京第1版

5

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texto de Felix Sutton ; ilustraciones de Leonard Vosburgh ; editado bajo la supervisión del Paul E. Blackwood

Editorial Molino 1972 Colección cómo y por qué 38

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by Ellsworth S. Obourn, Paul E. Blackwood, Margaret J. McKibben

U.S. Department of Health, Education, and Welfare, Office of Education , United States Government Printing Office 1962 Bulletin / U.S. Department of Health, Education, and Welfare, Office of Education 1962, no. 3

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Paul E. Blackwood ; in consultation with Paul F. Brandwein ... [et al.]

Harcourt, Brace & World c1960 3rd ed

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by Paul E. Blackwood

In-house reproduction Bulletin / Department of the Interior, Bureau of Education 1951, no. 10 . The place of subjects series

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Glenn O. Blough, Paul E. Blackwood

In-house reproduction Bulletin / Department of the Interior, Bureau of Education 1948, no. 4

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