Galvin, Thomas J. Problems in reference service : Case studies in method and policy / by Thomas J. Galvin. Foreword by Francis Neel Cheney. - New York : R. R. Bowker Co., c1965 [Printing 1966]. - xix, 177 p. ; 24 cm. Includes bibliographies. Subjects--Topical Terms: Reference services (Libraries)--Case studies.Library science--Case studies. Dewey Class. No.: 025.52 / GAP 1966