Ivanova, Kalina, and Kaloyan Zdravkov. “Digital Collections in Regional Public Library ‘P. R. Slaveikov’ – Veliko Tarnovo in the Context of the National Program for Preservation and Promotion of Literary Heritage”. Digital Presentation and Preservation of Cultural and Scientific Heritage 1 (September 30, 2011): 180. Accessed December 2, 2024. https://dipp.math.bas.bg/dipp/article/view/dipp.2011.1.22.