Donal A. Wollheim was a science fiction writer, editor and publisher and a fan. He published his own work under a pseudonyms. He was a leading influences on the development of science fiction and science fiction fandom in the 20th century. This is a great book of the analyzation of science fiction writing during that time.
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http://www.markrkelly.com/Blog/2015/09/18/rereading-donald-a-wollheims-the-universe-makers/
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