Osnovni nasoki za intenzifikat͡s︡ii͡a︡ na obuchenieto
By: M. Andreev, Al.P. Keĭl, Zh. Savova.
Publisher: Ministerstvo na nar. prosveta, Glav. direkt͡s︡ii͡a︡ "Obshtoobrazovatelna podgotovka"
Published: 1982
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 49