| 1 |  | The Merck index : An encyclopedia of chemicals and drugs / Martha Windholz . - 9th ed. - New Jersey : Merck & Co , 1976. - [1952 tr. đánh số từng phần] ; 26 cm Thông tin xếp giá: : 000/A.000278 |
| 2 |  | The Merck Index of chemicals and drugs : An encyclopedia for chemists, pharmacists, physicians, and members of allied professions / Paul G. Stecher . - 7th ed. - New Jersey : Merck & Co , 1960. - XI,1642 tr ; 27 cm Thông tin xếp giá: : 000/A.000277 |