The practitioner, clinical investigator, house officer, student, nurse, hospital administrator, and medical economist seeking medical information see before them a vast and rapidly growing jungle of journals, proceedings, books, technical reports, and other compilations of fact and concept. When they face this jungle they have two questions. What information that I need lies within? How do I get to it?
There are means of answering these questions (1, 2). The MEDLARS system of the National Library of Medicine offers, through Index Medicus and various on-line bibliographic systems, access to the titles of articles and other documents to be found in