Is it common for serials that come in both print and electronic versions to
have 2 different ISSNs, or do they only have different ISSNs if the electronic
version doesn't exactly duplicate the information in the print version?  One
of the Reference librarians at my institution asked me about this and when I
checked a couple of journal Web databases we subscribe to, I got an ambiguous
answer.  The ISSNs in the JSTOR database matched the print version ISSNs and
the ISSNs in the Project Muse database were different from the print version.
JSTOR journals are suppose to be duplicates of the print versions, but Project
Muse includes a subject index after each article in the Table of Contents and
enhanced illustrations.  I thought the differences between the electronic and
print versions of serials found in the Project Muse database might explain the
different ISSNs.

Thanks for your help.

Jill D. Yaples
Electronic Cataloger
Cataloging Unit
Binghamton University Libraries
Binghamton, NY 13902
E-mail:  jyaples@bingvmb.cc.binghamton.edu