The Merck index.

1952-1960: "An encyclopedia for chemists, pharmacists, physicians, and members of allied professions."Published: Whitehouse Station, NJ, <2001->Editor: 1976- , M. Windholz."An encyclopedia of chemicals, drugs, and biologicals"[varies]1952-1960: "An encyclopedia for chemists, pharmacists, physicians, and members of allied professions."Mode of access: Internet.First ed. published in 1889 under title: Merck's index to fine chemicals and drugs for the materia medica and the arts; 2d ed. under title: Merck's 1896 index; 3d ed. under title: Merck's 1907 index; 4th ed. (1930) under title: Merck's index; 6th-7th editions (1952-1960) under title: The Merck index of chemicals and drugs.Sci, Last v. SciRef; C, Rare