Source Publication (e.g., journal title)
Some 25% of CD-ROM databases contain some full text and this number is growing. Text is stored in ASCII files, which are machine-searchable, and image files, which are not. Some products contain a combination of both types of text. Books, documents and magazines are among the materials available.
Tenopir, Carol, "Full Text on CD-ROM" (1992). School of Information Sciences -- Faculty Publications and Other Works.