herd book - any book, file or data medium which is maintained by an officially approved breeders' association or organization, and in which pure-bred breeding animals of a specified breed are entered , herd-book - a book containing the pedigree and other particulars of a breed of cattle or pigs; corresponding to the stud-book for horses, and the flock-book for sheep, the record of animals kept by breeding societies in which only the offspring of registered animals can be recorded, andmekogum tõuloomade põlvnemise, jõudluse ja aretusväärtuse kohta