The Rows of Cherry Trees by Takahashi Makoto — Completed

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This manga is quite old--it's from 1957. It centers around three members of the table tennis club at an all-girl school. Though it may not quite be yuri, it's a precursor to current yuri manga.

Chapter 1 released Dec 29 '08
Chapter 2 released Jun 5 '09
Chapter 3 released Jun 5 '09
Chapter 4 released Jul 17 '11