Robert,
The 400 people in question may be on NOMAIL, may be set to DIGESTS, or
there may be duplicate addresses that have not yet been cleared out.
Anita Cohen-Williams; Reference Services; Hayden Library
Arizona State University, Tempe, AZ 85287-1006
PHONE: (602) 965-4579 FAX: (602) 965-9169
INTERNET: [log in to unmask] Owner: HISTARCH