You can spend days searchingforchemical information here . . .
or minutes here
forthe
best search possible.
Dialog - worlds biggest single source of online chemical information. Chemical literature searching has certainly come out of the stacks. Thanks to computers, there are faster, more thorough ways to work. Clearly the best of those ways is the Dialog Service, for these reasons:
Who has the most? Dialog, with more than 4,500,000 references to Chemical Abstracts (CA Search) alone. And those files, reaching back to 1967, include bibliographic citations and index information for all years. Then, in addition to CA Search, Dialog has almost as many more references to other chemical information in journal articles, patents, reports, government documents, and other worldwide published literature.
How do you searchforsubstances? You can find more than 3,360,000 substances by nomenclature, molecular formulas, ring data, element counts, and other characteristics. These include all sub-
stances cited by CA between 1972 and the present. You can also search the chemical literature in Dialog by 16 different access points including title words, subject terms, patent numbers, authors, and CA registry numbers. And Dialog is the only online system featuring related term displays and incorporating CA's Index Guide.
How do you learn to use Dialog? Because chemical databases differ so from databases of other subjects, we provide subject-specific search training—for both the librarian and the chemist, in lecture format as well as through an online practice file. For complete information, call or write to Lockheed Information Systems, Dept. 52-80AC, 3460Hillview Ave Ave., Palo Alto, CA 94304. In the U.S.A., call toll-free (800) 227-1927 or (800) 227-1960; in California, (800) 982-5838.
Lockheed Dialog
CIRCLE 125 ON READER SERVICE CARD
