Atlas du developpement embryonnaire precoce chez les ovins = Atlas of the early development of the sheep embryo, (Ovis aries) / Wintenberger-Torres, Suzanne Sevellec, Claude Veterinary embryology Sheep Sheep 636 INS 1987 A056 Or. In French and English Paris : Institut national de la recherche agronomique (INRA), 1987 1987 Text 51 p. :