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  1. By: Swellengrebel, N. H. (Nicolaas Hendrik),
    Type: Article
    In: Tijdschrift voor entomologie
    Volume: 64
    Date: 1921
    Page Range: 36--45
    Publication Info: [Amsterdam], Nederlandse Entomologische Vereniging,
  2. By: Swellengrebel, N. H. (Nicolaas Hendrik),
    Type: Article
    In: Quarterly journal of microscopical science
    Volume: 54
    Series: 2
    Date: 1910-02-01
    Page Range: 623--629
    Publication Info: London J. and A. Churchill [etc.]
  3. By: Swellengrebel, N. H. (Nicolaas Hendrik), - Swellengrebel de Graaf, J. M. H.
    Type: Article
    In: Tijdschrift voor entomologie
    Volume: 63
    Date: 1920
    Page Range: 96--108
    Publication Info: [Amsterdam], Nederlandse Entomologische Vereniging,
  4. By: Swellengrebel, N. H. (Nicolaas Hendrik), - Swellengrebel de Graaf, J. M. H.
    Type: Article
    In: Bulletin of entomological research
    Volume: 11
    Date: 1920
    Page Range: 77--92
    Publication Info: Farnham Royal, Commonwealth Agricultural Bureaux,