Basic research methods for librarians /

Autor Powell, Ronald R., 1944-
Vydáno 1997

Basic research methods for librarians /

Autor Powell, Ronald R., 1944-, Connaway, Lynn Silipigni
Vydáno 2004

Library and information science research in the 21st century : a guide for practising librarians and students /

Autor Lawal, Ibironke O.
Vydáno 2009