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  1. Chloropidae : eine monographische studie /
    By: Becker, Theodor. - Musei Nationalis Hungarici.
    Publication info: [Hungary :Musei Nationalis Hungarici,1900?]-1912.
    Holding Institution: Smithsonian Libraries
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  2. Chloropidae. Eine monographische Studie / Tiel I, Palaärktische Region :
    By: Becker, Theodor.
    Holding Institution: Smithsonian Libraries
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  3. Dipteren aus Südarabien und von der Insel Sokótra /
    By: Becker, Theodor.
    Publication info: Wien :Aus der Kaiserlich-Königlichen Hof- und Staatsdruckerei,1910.
    Holding Institution: Smithsonian Libraries
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  4. Dipterologische Studien.
    By: Becker, Theodor.
    Publication info: Wien,Zool.-botan. gesellschaft,1921.
    Holding Institution: Smithsonian Libraries
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  5. Dipterologische studien; Dolichopodidae der Indo-Australischen region,
    By: Becker, Theodor.
    Publication info: 's-Gravenhage,M. Nijhoff,1922.
    Holding Institution: Smithsonian Libraries
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  6. Katalog der Pala¨arktischen dipteren Bd. 4, Cyclorrapha Schizophora : Holometopa /
    By: Becker, Theodor. - Bezzi, Mario,
    Publication info: Budapest ;Wesselényi,1905.
    Holding Institution: Smithsonian Libraries
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  7. Katalog der Pala¨arktischen dipteren Bd. 1, Orthorrhapha Neatochera /
    By: Kertész, Kálmán. - Becker, Theodor.
    Publication info: Budapest ;Wesselényi,1903.
    Holding Institution: Smithsonian Libraries
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  8. Katalog der Pala¨arktischen dipteren Bd. 3, Cyclorrapha Aschiza. Cyclorrapha Schizophora : Schizometopa /
    By: Bezzi, Mario, - Becker, Theodor. - Stein, P.
    Publication info: Budapest ;Wesselényi,1907.
    Holding Institution: Smithsonian Libraries
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  9. Katalog der Pala¨arktischen dipteren Bd. 2, Orthorrhapha Brachycera /
    By: Bezzi, Mario, - Becker, Theodor.
    Publication info: Budapest ;Wesselényi,1903.
    Holding Institution: Smithsonian Libraries
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  10. Katalog der Paläarktischen dipteren /
    By: Becker, Theodor.
    Publication info: Budapest ;Wesselényi,1903-1907.
    Holding Institution: Smithsonian Libraries
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