Automatizacija na bibliotečnite i informacionnite procesi v bibliotekite pri visšite učebni zavedenija : sbornik dokladi : naučna konferencija s meždunarodno učastie Varna, 15-16 septemvri 1981 g. Varna : Visš institut za narodno stopanstvo "Dimitar Blagoev", 1981. 284 s. [Copy count : 1, currently available 1, at library only 0]

1982 ,no. 1-12. Work study : a journal which serves to promote productivity through time and motion study, job evaluation, process control and related subjects. London : Sawell Pub., 1982. 1 zv. mesačník [Copy count : 1, currently available 0, at library only 1]