Why do some titles have the same issue listed twice with two different links?
A. Some publishers post the contents of their journals on their own websites, in addition to ‘aggregator’ sites (such as Ingenta). If free sample issue(s) are offered at both sites, we list them both. This policy gives users the option of which site to choose if the same free issue is poated on both sites. It also helps us to follow future changes at both websites which may result in two DIFFERENT free sample issues being offered simultaneously on the two sites.
