Politekhnicheskii͡a︡t print͡s︡ip i obuchenieto po prirodnite uchebni dist͡s︡iplini
By: Angel Penev ... [et al.].
Contributors: Penev, Angel.
Publisher: Direkt͡s︡ii͡a︡ "Nar. prosveta"
Published: 1979
Place of publication: Smoli͡a︡n
Language: bul
Number of pages: 58