Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Kovacevski, J., Lazarov, Bogdanov, Balevski, and Martinov. 1949. Nachschlagebuch fur Planzenschutz gegen Krankheiten und Schadlinge [In Bulgarian]. Zemisdat, Sofia. 483 p.
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