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FOR THE BARREL

フォー・ザ・バレル

Alternative

novel
In 1979, before the end of the anime, Yoshiyuki Tomino himself created the first novelizations of the original Gundam anime series. The novels, issued as a series of three books, allowed him to depict his story in a more sophisticated, adult, and detailed fashion. Along with this adaptation came several major changes to the story. 

(Source: Wikipedia)

Other

manga
A comic accompaning the serialized novel 

*Note: this work never received a tankoubon release.*