Problemi na obuchenieto na srednoshkolskii͡a aktiv
By: [Emilii͡a Rangelova].
Publisher: T͡Sentr. komsomolska shkola "Georgi Dimitrov" pri T͡SK na DKMS
Published: 1979
Place of publication: Sofii͡a
Language: bul
Number of pages: 23