edited by Frederik Pohl

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If, worlds of science fiction. No. 118 (Sept. 1967)

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If, worlds of science fiction. No. 120 (Nov. 1967)

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If, worlds of science fiction. No. 122 (Jan. 1968)

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If, worlds of science fiction. No. 123 (Feb. 1968)

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If, worlds of science fiction. No. 124 (March 1968)

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If, worlds of science fiction. No. 125 (April 1968)

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If, worlds of science fiction. No. 126 (May 1968)

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If, worlds of science fiction. No. 127 (June 1968)

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If, worlds of science fiction (October 1965)

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I grandi maestri della SF 2