lira rings . . . have been located in the world's chemical literature through the year 1961 by the staff of the Chemical Abstracts Service. Q These rings now can be directly traced to their original sources through the cumulative index in Supplement II to THE RING INDEX. This new feature provides the only compact reference to all ring systems up to this recent date. Q If you frequently work with cyclic compounds, Supplement II and its preceding volumes can insure their correct naming and numbering and improve the efficiency of your literature searching. Supplement II to THE RING INDEX (with cumulative index) 9,735 through 11,524 rings / 515 pages $10.00 Supplement I to THE RING INDEX 7,728 through 9,734 rings / 371 pages THE RING INDEX / Second Edition 1 through 7,727 rings / 1,425 pages
Order from: AMERICAN CHEMICAL SOCIETY Special Issues Sales Department RHB 1155 Sixteenth Street, N.. W. Was^'rmtorv D C 2003?
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