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Baris 26: * {{cite book \| first=Mike \| last=Ashley \| title=Gateways to Forever: The Story of the Science-Fiction Magazines from 1970 to 1980\| publisher=Liverpool University Press\| location=Liverpool\| year=2007 \| isbn= 978-1-84631-003-4}} * {{cite book \| first=Mike \| last=Ashley \| title=Transformations: The Story of the Science Fiction Magazines from 1950 to 1970\| publisher=Liverpool University Press\| location=Liverpool\| year=2005 \| isbn= 0-85323-779-4}} * {{cite book\|last=Clute\|first= John\|author2=Nicholls, Peter\| title= The Encyclopedia of Science Fiction\|url=https://archive.org/details/encyclopediaofsc00ies1\| year=1993\| publisher= St. Martin's Press, Inc.\| location= New York\| isbn= 0-312-09618-6}} * {{cite book\|last= Nicholls\|first= Peter\| title= The Encyclopedia of Science Fiction\| year=1979\| publisher= Granada Publishing\| location= St Albans\| isbn= 0-586-05380-8}} * {{cite book \| first=Frederik \| last=Pohl \| title=The Way the Future Was\| publisher=Gollancz\| location=London \| year=1979 \|isbn= 0-575-02672-3}} * {{cite book \|title=Science Fiction of the 20th Century: An Illustrated History \|url=https://archive.org/details/sciencefictionof0000robi \|last= Robinson\|first=Frank M. \|year= 1999\|publisher=Barnes & Noble \|location=New York \|isbn=0-7607-6572-3}} * {{cite book \| first=Donald H. \| last=Tuck \| title=The Encyclopedia of Science Fiction and Fantasy \| volume=3 \| publisher=Advent: Publishers, Inc. \| location=Chicago \| year=1982 \| isbn= 0-911682-26-0}} {{refend}}

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