Zhelezova, B 1956: Beitrag zur Flechtenflora Bulgariens. - Bulgar Akad. na Nauk., Izv. na Bot. Inst. [Acad. des Sci. de Bulgarie, Bull. de l'Inst. Bot.]5: 387-404. [RLL List # 28 / Rec.# 20759] Keywords: BULGARIA/ FLORA
Abstract: [130 species. In Bulgarian, German and Russian summaries.]