1.

図書
図書
1. Fundamentals of day camping
by Grace L. Mitchell
出版情報: New York : American Association, [c1961]
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2.

図書
図書
2. Camp counseling : an illustrated book of know-how for the camp worker. 3rd ed
A. Viola Mitchell, Ida B. Crawford
出版情報: Philadelphia : W.B. Saunders, 1961
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