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Radchenko, A. G. 1995a ("1994"). A review of the ant genus Leptothorax (Hymenoptera, Formicidae) of the central and eastern Palearctic. Communication 1. Subdivision into groups. Groups acervorum and bulgaricus. [In Russian.]. Vestnik Zoologii 1994(6):22-28. [1995-03-01>] 127970

November-December 1994 issue. Date signed for printing ("podpisano k pechati"): 1 March 1995.