Варнене Рeгинa. Information and bibliographical supply of scientific and technical problems. Knygotyra, [S. l.], v. 24, n. 17-2, p. 40–55, 1991. Disponível em: https://www.journals.vu.lt/knygotyra/article/view/30101.. Acesso em: 20 may. 2024.