Okhrana na truda vŭv vŭglishtnite rudnit͡s︡i
By: Georgi Lazarov.
Publisher: Nauchnoizsledovatelski institut po profsŭi͡u︡zni problemi G. Dimitrov pri T͡S︡S na BPS
Published: 1978
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 71
Subjects: Coal mines and mining -- Safety measures.
Notes: Bibliography: p. 69-71.
Summary in English and Russian.