Krombein, K. V. 1958. Date of publication, First supplement, Synoptic catalog of North American Hymenoptera. Proceedings of the Entomological Society of Washington 60:266.
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Kondoh, M. 1961. Ants from Hakone region. [In Japanese.]. Hakone Hakubutsu 1:16-27.
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Kondoh, M.; Kitazawa, Y. 1984. Ant communities on the campus of UOEH and in an adjacent natural forest. Journal of UOEH (University of Occupational and Environmental Health) 6:221-234. PDF
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Königsmann, E. 1977. Das phylogenetische System der Hymenoptera. Teil 2: Symphyta. Deutsche Entomologische Zeitschrift (N.F.)24:1-40.
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Kotzias, H. 1930. Formica picea Nyl. in Schlesien. Zoologischer Anzeiger 92:56-58.
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Kramer, K. U. 1950. Een verwaarloosde Nederlandse Myrmica vorm? Entomologische Berichten (Amsterdam) 13:97-98.
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Kratochvíl, J. 1938. Myrmekologické poznámky, 1-2. Entomologické Listy 1:161-162. PDF
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Knowlton, G. F. 1970. Ants of Curlew Valley. Proceedings of the Utah Academy of Sciences, Arts and Letters 47(1):208-212.
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Knowlton, G. F.; Harmston, F. C. 1939. Utah Hymenoptera. Utah Agricultural Experiment Station Mimeograph Series 200(4):1-8.

Notes: Ants pp. 6-8.

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Koehler, W. 1951. Fauna mrówek Pieninskiego Parku Narodowego. Warszawa: Panstwowe Wydawnictwo Rolnicze i Lesne, 55 pp.
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Kofler, A. 1978. Faunistik der Ameisen (Insecta: Hymenoptera, Formicoidea) Osttirols (Tirol, Österreich). Bericht des Naturwissenschaftlich-Medizinischen Vereins in Innsbruck 65:117-128.
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