Title: Edinadeseti Nat͡sionalni pedagogicheski chetenii͡a
Subjects: Classroom management, Congresses, Dimitrovska pionerska organizat︠s︡ii︠a︡ "Septemvriĭche", Educational innovations, Physical education and training, Rural Education, School management and organization, Science, Special education, Study and teaching
Places: Bulgaria, Congresses, Soviet Union