Title: Prirodnye resursy Voronezhskoi oblasti i ikh okhrana
Subjects: Iubileinaia nauchno-prakticheskaia konferentsiia, posviashchennaia 50 [i.e. piatidesiati]-letiiu Vserossiiskogo obshchestvaa okhrany prirody, Voronezh?, 1974
People: K. K. Kalutskii