The full bibliographical reference for the searched title “Todorowa & Petkoff, 1915” is:
Todorowa, W. & Petkoff, P. (1915) [Beitrag zur Macrolepidopteren-Fauna der Umgebung von Tzaribrod und Trn (Bulgarien).]
Trud. bulg. prir. Druzh. 8: 128—147 [In Bulgarian].
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