biblio toscana

• The Merck index

  Rahway, N.J. : Merck, 1968
• The Merck Index

  Rahway (New Jersey) : Merck & Co., 1968
• The Merck index

  Rahway, N.J. : Merck, 1976
• The Merck Index

  Rahway (New Jersey) : Merck & Co., 1976
• The Merck index

  Rahway : Merck, 1983
• The Merck Index

  Rahway, New Jersey : Merck & Co., 1983
• The Merck Index

  Rahway (New Jersey) : Merck & Co., 1989
• The Merck index

  Whitehouse Station, N. J. : Merck, 1996
• The Merck index

  London \etc.! : Chapman & Hall, \1996!
• The Merck Index

  Whitehouse Station (New York) : Merck Research Laboratories, 1996
• The Merck index

  Whitehouse Station (NJ) : published by Merck research laboratories division of Merck, ©2001
• The Merck Index

  Whitehouse Station (New Jersey) : Merck & Co., 2001
• The Merck Index

  Whitehouse Station, New Jersey : Merck & Co., 2006
• The Merck index

  Whitehouse Station (NJ) : published by Merck Research Laboratories, division of Merck & Co., 2006