W.A.B., Christofferson, P.V.,Massler, M., and Weiss, M.B.
(1960). Postnatal Tooth Development in cattle, American
Journal of Veterinary Research, International Journal of Osteoarchaeology.
21: 7-34 Abstract
W. A. B. (1960). Eruption of the first permanent
incisor in cattle. Transactions of the European
Orthodontic Society. 1-4.
analysis of x-rays taken of the mandibular incisor region
of 869 cattle shows the first permanent incisor develops,
at six months of age, at right angles to its final erupted
position eighteen months later. Its eruption path rotates
through 900 .