1.

図書
図書
1. Science of coaching tennis
Jack L. Groppel ... [et al.]
出版情報: Champaign, IL : Leisure Press, c1989
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2.

図書
図書
2. Tennis for advanced players and those who would like to be (: pbk)
Jack L. Groppel
出版情報: Champaign, Ill. : Human Kinetics Publishers, c1984
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