1.

図書
図書
1. YMCA progressive swimming instructor's guide (: pbk.)
YMCA of the USA
出版情報: [Champaign, IL] : YMCA of the USA : Purchased from the YMCA Program Store, c1986
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2.

図書
図書
2. Y skippers : an aquatics program for children five and under
YMCA of the USA
出版情報: Champaign, IL : YMCA, c1987
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