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    Title :

    A comparison between the 19th century early proposals and the 20th–21st centuries realized projects intended to contact other planets



    Published in:

    Publication date :

    2012



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.60 Raumfahrttechnik / 55.60 / 50.93 / 50.93 Weltraumforschung
    Local classification TIB:    050/7040