It means the book is on the InfoTract reference list about the subject of the book
The InfoTrac is a comprehensive and powerful reference resource for student
and consumer research.
The InfoTrac combines tens of thousands of articles from major encyclopedias
, reference books, magazines, pamphlets, and other sources onto a single Web
site with fast and easy search tools for all your reference needs. InfoTrac
College Edition is the ideal one-stop reference source for students doing
homework, making vacation plans, keeping up with current events, or
researching any topic from important health issues to hobbies to making
large purchasing decisions. And its information can be accessed anytime!