The Collaborative International Dictionary of English v.0.48:

Studbook \Stud"book`\, n.
   A genealogical register of a particular breed or stud of
   horses, esp. thoroughbreds.
   [1913 Webster]

WordNet (r) 3.0 (2006):

studbook
    n 1: official record of the pedigree of purebred animals
         especially horses

Moby Thesaurus II by Grady Ward, 1.0:

31 Moby Thesaurus words for "studbook":
   Almanach de Gotha, Red Book, Royal Kalendar, Social Register,
   atlas, blue book, calendar, casebook, catalog, catalogue raisonne,
   city directory, classified catalog, concordance, cyclopedia,
   diatesseron, dictionary catalog, directory, encyclopedia,
   gazetteer, genealogy, harmony, index, pedigree, phone book,
   polyglot, record book, reference book, source book, telephone book,
   telephone directory, work of reference