Goodman and Gilman's The Pharmacologic Basis of Therapeutics, Ninth Edition. CD-ROM, Edited by Joel G. Hardmann and Lee E. Limbird, with Perry B. Molinoff, Raymond W. Ruddon, and Alfred Goodman Gilman. System needed

Multimedia IBM PC or compatible computer with 4 MB RAM and at least 6 MB hard-disk space. (Also available for Macintosh System 7.0 or higher, with 4 MB RAM and at least 4 MB free hard-disk space.) New York, McGraw-Hill, 1997. $95. ISBN 0-07-864186-1.; The Merck Index, 12th Edition. (Vol. 1.) CD-ROM, with user's guide, 55 pp. System neededMultimedia IBM PC or compatible computer with 8 MB RAM and 12 MB hard-disk space. New York, Chapman & Hall, 1997. $250. ISBN 0-412-75650-1