Pengarang : Wahana Komputer - Gary L. Cromwell - Mary E. Allen - Michael L. Galyean - [dkk] - Committe on Mineral and Toxic Subtances in Diet and Water for Animals -
Pengarang : Gary L. Cromwell - Mary E. Allen - Michael L. Galyean - [dkk] - Committe on Mineral and Toxic Subtances in Diet and Water for Animals - Michael A. Hitt - R. Duane Ireland - Robert E. Hoskisson -