RUSINOVA, Evgeniya.
 Approaches to Measuring the Efficiency of the Bulgarian Libraries.
<strong>Qualitative and Quantitative Methods in Libraries</strong>, [S.l.], v. 5, n. 2, p. 379-383, july 2017.
ISSN 2241-1925.
Available at: &lt;<a href="http://www.qqml.net/index.php/qqml/article/view/348" target="_new">http://www.qqml.net/index.php/qqml/article/view/348</a>&gt;. Date accessed: 06 may 2024.