1.

図書
図書
1. Playgrounds : their administration and operation. rev. ed.
by George D. Butler ; prepared for the National Recreation Association
出版情報: New York : A.S.Barnes, 1950
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2.

図書
図書
2. Introduction to community recreation. 2nd ed
George D. Butler
出版情報: New York : McGraw-Hill, 1949
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3.

図書
図書
3. Introduction to community recreation : prepared for the National Recreation and Park Association. 5th ed
George D. Butler
出版情報: New York : McGraw-Hill, c1976
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4.

図書
図書
4. Recreation and park yearbook 1961 : a nationwide inventory of the public recreation and park services of local, state and federal agencies for the year ending December
edited by George D. Butler
出版情報: New York : National Recreation Association, c1961
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