Electronic reference services (Libraries)

E-mail reference services (Libraries)
Electronic mail reference services (Libraries)
Email reference services (Libraries)
Digital reference services (Libraries)
Virtual reference services (Libraries)

WWW through Alta Vista June 17, 1999 ("electronic reference service," "digital reference service": sites where questions can be sent to library reference staff, who will provide answers; usually restricted to ready reference; also e-mail reference services, email reference services, electronic mail reference services)
Lipow, A. The virtual reference librarian's handbook, 2002: galley (live, interactive, remote service)