1. Equine Reproduction;Acland,1993
2. Antepartum evaluations of the equine fetus;Adams-Brendemuehl;J Reprod Fert Suppl,1987
3. Categorical data analysis;Agresti,1990
4. Sonographic identification of the fetal vernix in amniotic fluid;Bree;J Clin Ultrasound,1978
5. Use of ultrasound in equine medicine;Byars;Vet Clin North Am: Eq Pract,1986