Titles on added t.p.: Knowledge of and literature on the natural sciences in the period of the Bulgarian national revival ; Estestvennonauchnye znanii︠a︡ i literatura v period bolgarskogo vozrozhdenii︠a︡.
At head of title: Bŭlgarska akademii︠a︡ na naukite. Edinen t︠s︡entŭr po istorii︠a︡. Nauchna grupa po istorii︠a︡ na naukata.
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