One Of The First Yuri Mangas 

One of the first yuri mangas to have ever been published was "Shiroi Heya no Futari" back in the early seventies. Here is a link to the first (and only) volume of the manga. It has a nice story, however, it is quite heartbreaking.
الفاظ مطلوبہ: shiroi heya no futari. yuri, manga